AgentJayZ - I've got to say, your videos are a geek's paradise. I greatly enjoy your tours through turbine engine parts, start-ups, running, afterburning snow-clearing, etc. Thanks for taking the time to post super-interesting and informative videos.
@egn83b I don't know what makes a sterling engine work, but I think it works on the Sterling cycle... ? A piston engine works on the Otto cycle, and a gas turbine works on the Brayton cycle. These things, descriptions of, of me, ask you not... of you , in advance, thank, do I.
We weld repair them using stainless steel. The better the design of a combustor liner, the cooler it runs. In modern engines, they are ceramic coated. I'm not sure what the underlying metal structure is made of. Possibly Inconel, but it may very well be stainless steel.
Thank you for the clarification. There aren't very many ways a non-expert like myself can get a look into the inner workings of these engines. It's very nice of you to share your experience.
Hi, it is my believe all of us, fans or workers in the aviation, power plants entusiasts, need to thank you for your great work. You are transfering to all of us, what you love to do. Today we learned more of a very special part of these engines, the combustion liners. I remember wrote about the annular liners, and they are quite expensive units. These liners are used in the commercial airplanes and more fuel efficient than cans. Thank you again and keep doing this great work.
A very interesting report on the development of various combustion chambers. - Can - Combustors, tube - annular combustors and finally annular combustion chamber as in history. I have never in my life seen before these parts so close and well explained. Thank you :)
I just discovered your channel and am finding this stuff fascinating. I'm a teacher. You're a great teacher! I'm amazed that people can figure these designs out and have such confidence in them! I'm also amazed with how "simple" the basic design is. Your description of the burners reminds me a little of the burners on a gas stove with an ignitor in just one spot. Thanks!
I want to say thank you as well. I started learning about Jet engines not long ago. I spent a few hours watching one animation of a Turbo Jet engine until I finally wrapped my head around the way it worked and ever since I have been almost obsessed. It was very nice to see actual internals instead of just animations, they had actually had me puzzled for a long time about how such a thing would be mass produced. My biggest puzzling thought I seen you tried to explain was how to design the best possible designs for parts like the combustion chamber. I found the Pratt And Whitney the most interesting, I liked the way that it would make the fuel air mixture create a swirling motion before it moved onto the next cycle like normal piston combustion engines try to do with their intakes.
Thank you for the video. I've been fascinated by gas turbines for years and have just begun the deep dive into understanding their theories of operation. The video has been very helpful for a beginner like me!
Great look at all the various components of different engines. This sort of stuff is few and far between on youtube, so thank you very much for taking the time to record and explain the various functions of each part in easy to understand terms. Great to get an insight into the innards of these engines.
It is amazing that much of this technology was advanced long before computers were able to calculate CFD. Trial and error wasn’t an efficient way to create these assemblies, but the results of manual engineering was astonishing, producing great engines long before computers helped fine-tune these to be more powerful and efficient.
I work in a technical field and have to know how energy moves around. I take pride in my knowledge and ability. You, sir, blew my doors off with this video. I can surmise what's going on with the engine and fuel air mixture based on your explanation alone. The pure Tonka Toy geekiness of this warms the cockles of my heart, though. Thanks for posting.
This is another well explanation of combustor liners. Once I talked to you about annular combustor liners, but you don't work those, they are for commecial aviation. Thanks for this video and all the other ones. You are a good teacher!
Great overlook of the different designs. The inner combustor liner of JFS-100 looks preatty simmilar to the ones we use in our small gas turbines (ring of fire :-)). I`d love to have one of those old J-79 combustor liners - they look so cool. Really interseting video - thx for showing.
Thanks. Good study material for pilots and I always love seeing animals in the shops. They are cute, funny and provide much needed comic relief. Studying does get stressful every once in a while!
@MoowChair The pressure difference between the outside of the combustor liner and the inside is very small; just enough for the air to flow inwards through all those holes. The main stress on the liner is heat radiated from the flame of the burning fuel.
I tell you right in the video, at the same time you see it, that it's from a JFS100. It's a small gas turbine starter used by several US military engines.
@mytmousemalibu Yes, the turbine inlet nozzles direct hot combustion gases at the turbine. Whatever it is that makes those gases it not something the nozzles worry about.
absolutely awesome, thank you for patiently showing us, explaining in just enough detail to understand it but not so much detail that it's boring, monotonous and we wish I'll upon you and shop kitty.
@TheMan1510 A cmbination of stainless steel for toughness and resistance to cracking, and refractory alloys like Inconel or Hastelloy for maintaining strength at very high temperatures. They live in an environment of 1000mph wind at a temp of roughly 1000F, so they are built to be as far from fragile as possible.
We work on large industrial engines, occasionally military flight engines, and very rarely special projects like land speed cars, race boats and UFOs. Never mind that last one. The PT6 is a civil aviation engine, and we are prevented by law from working on anything in civil aviation. There IS an industrial version, called the ST6, but it is rare, and we have never seen one. Maybe someday...
The T56/501 uses a set of can-type liners inside a common outer case. This is known as the can-annular, or cannular arrangement. The can-type arrangement is what you see on our Orenda type 14 or J47 engines. These inaccuracies, presented in an instructional manner, are forcing me to remove your comments, as they are misleading to people who may not already know and are trying to learn.
Built combustors baskets for gas turbines at Westinghouse in the 80's! The Westinghouse 501 was an awesome engine to work on! We basically used Hasteloy, and had to punch out the holes and spotweld the rings together! Metal was too hard to drill!!
Hey just wanted to let you know your vids are awesome im a marine just started in my unit as a mech on hueys there a bit different than these turbine engines but im tryin to learn anyway i can and your vids r really helpful so thanks and i hope u will keep doing them
Nice video, thanks for posting. I'm curious...what part of the engine is it that receives the reaction force from the escaping exhaust gas, pushing the engine (and ultimately the aircraft) forward? Is it the flat area around the fuel nozzles at 8:24 ?
Yup, it's that flat lining that houses the fuel nozzles (since it's perpendicular to the direction of the flow of the gases), and the compressor blades to some extent, and also the main fan blades in case of high bypass/turbofans, Though I realise your question was specific to reaction force from the EXHAUST GASES, so really just that liner section. Who'd have thought that unassuming little section of metal is responsible for bearing such a great load and is so instrumental in the 3rd law execution of the engine's propulsion? :) Good observation and question btw!
It is there to swirl the small amount of air that comes through the snout and is used for initial combustion of the fuel. It is swirled to both decrease its axial velocity and to promote better mixing with the spray of fuel coming out of the fuel nozzle. This is a general description. Keep in mind that combustor liners are designed by a mixture of trial and error, black magic, and a tiny pinch of aerodynamic theory.
Hi AgentJayZ many thanks for the informative videos. I have known liners are being used in annular type combustion chambers to protect main material from high temperature. However I see no liners in this can type combustors. How are they protected from high temperature? Are they replaced frequently?
I don't call them injectors, because they contain no valve or other method of controlling fuel flow. They are not called combustion chambers, because the space where fuel is burned is made up of two separate parts: the outer case and the liner. There are different types of liners, so the question of how many ignitors per liner has several answers: either one, two, or none...
Amazing site, I work for Rolls-Royce and used to make the anular comdustors for the Panavia Tornado, the RB199 turbojet, I was the main Quality inspector. In now make the large fan blades for all the Trent series engines, very big fan blades
Nice video! Do you know if the annular 500000 buck combustion liner is so expensive due to an advanced production process, or for all the testing and development?
I'm just a guy who works with the stuff, and is interested in the history of how it all came to be the way it is... Lucky enough to get to tear apart and put together his boyhood dream... Jet engines and Rocket ships ! Ok... got a bit carried away there...
I've enjoyed your engine videos for a while now, thanks for keeping me in the turbine engine repair loop. After 30+ years working on P&WA, GE, CFM & IAE engines and 3 years retired it's nice to touch base with my work life. Boeing has a web site where they sell tee shirts, caps etc. it has a tab called Custom Hanger where they sell objects crafted from airplane parts. Some of the engine parts are a mirror framed by a #5 bearing housing from 727/737/DC9 aircraft, wine table from a bladed up JT8D fan disk where the bottles are nested between the blades, bar stool using a rear compressor hub and a JT8D combustion chamber a compressor stator framing a mirror among other objects. Guess I should be glad they're using these parts, I just hope they're not embarrassed by their new purpose in life
They are not fuel injectors, because they have no valve or any way of controlling the amount of fuel flow. They are called nozzles because that's what they are. Interestingly, fuel flow is controlled by a device called the fuel control. I do have a few videos posted featuring fuel nozzles in action being tested.
Question, Looking at the J79 Combustor, it has 6 mixing air holes around the injector nozzle hole. You have compressed air coming from the compressor going through these as as well as the other smaller cooling holes. Is all of the air coming from the compressor going through these holes, or will some of the air bypass the combustor? It just seems like there is a lot of volume (of air) being compressed through these holes. Thanks.
I think I just found the answer watching another video, "Why Jet Engines Don't melt". I see that there are "pieces" to divert "Some" of the air. Anyway, great job, this is really interesting stuff!
it seems in your video's watching and listening gives me the answers I seek thankyou the burner cans from the Orenda turbo-jet are larger than the J47 are these more powerful or are they bigger for greater cooling air around the inner cans this engine has really grown on me, I will try to find a small model to go with my RR Nene model but do want the Orenda and not a J47, thanks again AgentJayZ
Another great vid Jay. Excellent close ups. Question please:- What feeds all of them mixing holes to cool the burnt gases in the combusters? Is it from airflow around then engine? How does this work in a fighter jet set up? Cheers.
What does the flame look like, how far does it propagate from the low pressure area in the liner? Are any of these used combustors able to be placed placed back into service? What are the liners made of? stainless?
I have a Rolls Royce Derwent combustor liner. I was looking up info on it and found a really good PDF of an old Rolls Royce book called "Rolls Royce the Jet Engine Fifth Edition" that has some pretty interesting info on the configurations of the different holes on their liners. For curious folks, like myself, it's worth checking out for sure.
like the video. reminds me of when I was in high school we had an aircraft maintenance shop class. makes me wish I stayed the course and went to a tech school.
Any footage of reverse flow annular liners? I work on PT6As and I rarely get to see internals upstream of the power section. ....well, without using a boroscope that is.
I was just wondering the area where the igniter is put for a commercial engine combustor, in replacement of the igniter is instead an oxygen acetylene torch. You light it with one of those strikers like in chemistry and the. Set it to the blue flame. Would it combust what was needed to start the engine
Thanks for taking the time to show this stuff, it's fun to see. What did you study, and for how long? What is your role at that shop? What kind of metal are those made of and why? Some of those designs are very aesthetic, especially the one with 6 mixers. Others have some resemblance to the Dyson blade-less fan. Thanks!
Hey ur videos are just amazing , I have been watching ur videos . Just wanted to know how many Ignitors and Injectors are present in an combustion chamber.....
Any Idea how those are welded together? I tried to modify one several years ago and it cracked at every weld. I was welding with inconel wire using argon shielding gas. This was for a test project at one of our universities so I dont know which model it was. Charles
@milesall1 Out in the open like that, the holes in the liner would allow air to flow out, when in an engine air flows from the outside of the liner inwards. Your demo would be ultra cool if we could somehow make a combustor case out of glass so we could see inside a real running engine... Hmmmm....
Thank you very much !!!! I never seen a real combustor in my life and probably never will... And had no idea what they look like, now, i know. 1/2 million $ for the annular combustor.... Me too, i'd let it lie on the ground...
I worked at manufacturing plant that focused on liners, burner cans, and flow sleeves with other miscellaneous parts. Its mainly buying a sheet and rolling it into a drum, then seam welding it, expanding it out, and then they'd all go on a big tool that was shaped to the parts specifications on a flow turn lathe and formed. From there, it got machined, and countless hours of welding the hardware into the part. I loved it
hello agent zay. i want you to deeply explain the combustion part---you have explained about the combustion liner but the outer part or the outer case isnt explained. awsum video
Cool videos !!!I am very impressed with them all.My job is closely related. I work at a laser shop, and we laser a lot of parts for the aerospace industry. I happened to notice one sitting on top shelf behind you at the beginning of this video and was wondering if you could show us where in the engine it goes.We call it an M08 and burn all the holes and tabs at the top of the part. Thank you keep up the awesome videos!!
Hi, in your video at minute 1.30 is seen your cat and a very small combustion chamber. Could you tell me which turbine from? And most importantly could send me a few pictures of it, I need to make something similar for one of my turbine and I like the design. I would ask the main measures of the holes, but I think it will be much to ask for. Thanks for your help
Yeah, that impressed me too. The most expensive stuff is that which runs hottest. and is subject to the highest force, ie, centripetal. So that means the turbine blades, and the mounting ring they sit on, followed by the stationary stator blades. They (engines) do actually last well, and I wouldn't call the maintenance minor or simple, but turbine engines have become a bit of a miracle of reliability, in view of the temperatures and forces, they don't fail very much. Exceptional engineering.
I really enjoyed this evolution-peice! Would it be possible to make more of them? like from J47 (or earlier) to the present on various parts? I get that this was a rare opportunity, perhaps acquiring the footage of various parts over time could be a solution to that?
OK, I know of no bomber aircraft nicknamed lightning, so how about a hint? Also, many aircraft are available with more than one type of engine... and here in Jet City we deal with engines... not aircraft. So help me out, OK?
I am a GSM student and Have been watching all your video. Thank you very much for all.
You teach better than all teachers I ever had.
AgentJayZ - I've got to say, your videos are a geek's paradise. I greatly enjoy your tours through turbine engine parts, start-ups, running, afterburning snow-clearing, etc. Thanks for taking the time to post super-interesting and informative videos.
@egn83b I don't know what makes a sterling engine work, but I think it works on the Sterling cycle... ?
A piston engine works on the Otto cycle, and a gas turbine works on the Brayton cycle.
These things, descriptions of, of me, ask you not... of you , in advance, thank, do I.
love these videos. this is stuff every engineer studies in school, but few get to actually see.
We weld repair them using stainless steel. The better the design of a combustor liner, the cooler it runs.
In modern engines, they are ceramic coated. I'm not sure what the underlying metal structure is made of. Possibly Inconel, but it may very well be stainless steel.
Thank you for the clarification. There aren't very many ways a non-expert like myself can get a look into the inner workings of these engines. It's very nice of you to share your experience.
Hi, it is my believe all of us, fans or workers in the aviation, power plants entusiasts, need to thank you for your great work. You are transfering to all of us, what you love to do. Today we learned more of a very special part of these engines, the combustion liners. I remember wrote about the annular liners, and they are quite expensive units. These liners are used in the commercial airplanes and more fuel efficient than cans. Thank you again and keep doing this great work.
A very interesting report on the development of various combustion chambers. - Can - Combustors, tube - annular combustors and finally annular combustion chamber as in history. I have never in my life seen before these parts so close and well explained. Thank you :)
I just discovered your channel and am finding this stuff fascinating. I'm a teacher. You're a great teacher! I'm amazed that people can figure these designs out and have such confidence in them! I'm also amazed with how "simple" the basic design is. Your description of the burners reminds me a little of the burners on a gas stove with an ignitor in just one spot. Thanks!
I want to say thank you as well. I started learning about Jet engines not long ago. I spent a few hours watching one animation of a Turbo Jet engine until I finally wrapped my head around the way it worked and ever since I have been almost obsessed. It was very nice to see actual internals instead of just animations, they had actually had me puzzled for a long time about how such a thing would be mass produced. My biggest puzzling thought I seen you tried to explain was how to design the best possible designs for parts like the combustion chamber. I found the Pratt And Whitney the most interesting, I liked the way that it would make the fuel air mixture create a swirling motion before it moved onto the next cycle like normal piston combustion engines try to do with their intakes.
Thank you for the video. I've been fascinated by gas turbines for years and have just begun the deep dive into understanding their theories of operation. The video has been very helpful for a beginner like me!
Great look at all the various components of different engines. This sort of stuff is few and far between on youtube, so thank you very much for taking the time to record and explain the various functions of each part in easy to understand terms. Great to get an insight into the innards of these engines.
It is amazing that much of this technology was advanced long before computers were able to calculate CFD. Trial and error wasn’t an efficient way to create these assemblies, but the results of manual engineering was astonishing, producing great engines long before computers helped fine-tune these to be more powerful and efficient.
Your enthusiasm for your field is inspiring
I work in a technical field and have to know how energy moves around. I take pride in my knowledge and ability. You, sir, blew my doors off with this video. I can surmise what's going on with the engine and fuel air mixture based on your explanation alone. The pure Tonka Toy geekiness of this warms the cockles of my heart, though. Thanks for posting.
Every video (episode) more and more amazing. Do not stop making it. Thank you
This is another well explanation of combustor liners. Once I talked to you about annular combustor liners, but you don't work those, they are for commecial aviation. Thanks for this video and all the other ones. You are a good teacher!
sooo cool, thank you for explaining it to those of us who love them but aren't sure how the detail of it works, we kind of do now, Awesome
@circe362 I think so, but I didn't look any closer than in the video. And it's in the engine now...
Thanks for taking the time to make these videos, I have been watching a lot of them tonight and am learning alot! Thanks!
Spoiler alert: the cat is the chief engineer.
Great overlook of the different designs. The inner combustor liner of JFS-100 looks preatty simmilar to the ones we use in our small gas turbines (ring of fire :-)). I`d love to have one of those old J-79 combustor liners - they look so cool.
Really interseting video - thx for showing.
Wow, thanks for the tour, I really enjoyed it!
Thanks. Good study material for pilots and I always love seeing animals in the shops. They are cute, funny and provide much needed comic relief. Studying does get stressful every once in a while!
@MoowChair The pressure difference between the outside of the combustor liner and the inside is very small; just enough for the air to flow inwards through all those holes.
The main stress on the liner is heat radiated from the flame of the burning fuel.
I tell you right in the video, at the same time you see it, that it's from a JFS100. It's a small gas turbine starter used by several US military engines.
As usual you are the best of the best in my book ,and the way you describe em is the beauty of these videos .
Fascinating! I always wondered what the annular combustors looked. Great to compare several different designs side-by-side.
@465maltbie Inconel and other refractory alloys like hast-X... are extremely difficult to weld.
@mytmousemalibu Yes, the turbine inlet nozzles direct hot combustion gases at the turbine. Whatever it is that makes those gases it not something the nozzles worry about.
absolutely awesome, thank you for patiently showing us, explaining in just enough detail to understand it but not so much detail that it's boring, monotonous and we wish I'll upon you and shop kitty.
@TheMan1510 A cmbination of stainless steel for toughness and resistance to cracking, and refractory alloys like Inconel or Hastelloy for maintaining strength at very high temperatures.
They live in an environment of 1000mph wind at a temp of roughly 1000F, so they are built to be as far from fragile as possible.
Hi DrZ, I really love your videos and your excellent commentary. A special thanks to Shop Kitty.
We work on large industrial engines, occasionally military flight engines, and very rarely special projects like land speed cars, race boats and UFOs.
Never mind that last one.
The PT6 is a civil aviation engine, and we are prevented by law from working on anything in civil aviation.
There IS an industrial version, called the ST6, but it is rare, and we have never seen one. Maybe someday...
The T56/501 uses a set of can-type liners inside a common outer case. This is known as the can-annular, or cannular arrangement.
The can-type arrangement is what you see on our Orenda type 14 or J47 engines.
These inaccuracies, presented in an instructional manner, are forcing me to remove your comments, as they are misleading to people who may not already know and are trying to learn.
Built combustors baskets for gas turbines at Westinghouse in the 80's! The Westinghouse 501 was an awesome engine to work on! We basically used Hasteloy, and had to punch out the holes and spotweld the rings together! Metal was too hard to drill!!
Hey just wanted to let you know your vids are awesome im a marine just started in my unit as a mech on hueys there a bit different than these turbine engines but im tryin to learn anyway i can and your vids r really helpful so thanks and i hope u will keep doing them
Woah, that CF-6 combustor is pretty sweet. The J-75 can-annular one is also quite interesting. Thanks for the videos!
Thank you for your response. I look forward to watching your next fuel nozzle videos.
OMG!!! It’s the head of the IG88 Bounty Hunter from “The Empire Strikes Back” !!! LOL
Nice video, thanks for posting. I'm curious...what part of the engine is it that receives the reaction force from the escaping exhaust gas, pushing the engine (and ultimately the aircraft) forward? Is it the flat area around the fuel nozzles at 8:24 ?
Yup, it's that flat lining that houses the fuel nozzles (since it's perpendicular to the direction of the flow of the gases), and the compressor blades to some extent, and also the main fan blades in case of high bypass/turbofans,
Though I realise your question was specific to reaction force from the EXHAUST GASES, so really just that liner section.
Who'd have thought that unassuming little section of metal is responsible for bearing such a great load and is so instrumental in the 3rd law execution of the engine's propulsion? :)
Good observation and question btw!
It is there to swirl the small amount of air that comes through the snout and is used for initial combustion of the fuel. It is swirled to both decrease its axial velocity and to promote better mixing with the spray of fuel coming out of the fuel nozzle.
This is a general description. Keep in mind that combustor liners are designed by a mixture of trial and error, black magic, and a tiny pinch of aerodynamic theory.
@Bobkse You only need one, and the other is just a backup.
Hi AgentJayZ many thanks for the informative videos. I have known liners are being used in annular type combustion chambers to protect main material from high temperature. However I see no liners in this can type combustors. How are they protected from high temperature? Are they replaced frequently?
You need to watch the whole series.
On a non flying industrial jet power unit, is it possible to use water injection to lower gas temperatures and increase power?
Yes, it is a common practice, mainly to reduce NOx emissions.
I agree with shop kitty, the JFS100 is the best.
Great video!, do you have any videos illustrating fuel injectors: pressure-swirl, vaporizers, and airblast ? Many thanks!
I don't call them injectors, because they contain no valve or other method of controlling fuel flow.
They are not called combustion chambers, because the space where fuel is burned is made up of two separate parts: the outer case and the liner.
There are different types of liners, so the question of how many ignitors per liner has several answers: either one, two, or none...
Well done, thanks a lot for sharing!
What Paul said.
Very interesting, and answers a bunch of curiosity. Thanks mate
Amazing site, I work for Rolls-Royce and used to make the anular comdustors for the Panavia Tornado, the RB199 turbojet, I was the main Quality inspector. In now make the large fan blades for all the Trent series engines, very big fan blades
Nice video! Do you know if the annular 500000 buck combustion liner is so expensive due to an advanced production process, or for all the testing and development?
Great video! A great addition to books.
Friday in the classroom teaching turbine engine theory at Red River College. Shop kitty was a big hit. Thanks for your vids!
I applied for a job there... No response.
@@AgentJayZ You're too cool for this place.
cool. I like the final scene when you shoot through the liner.
I'm just a guy who works with the stuff, and is interested in the history of how it all came to be the way it is...
Lucky enough to get to tear apart and put together his boyhood dream... Jet engines and Rocket ships !
Ok... got a bit carried away there...
You make me wish my day had 200 hours Jay !
I could watch your vids till hell freezes over !
This was a GREAT lessons,thank you very much Jay!
I've enjoyed your engine videos for a while now, thanks for keeping me in the turbine engine repair loop. After 30+ years working on P&WA, GE, CFM & IAE engines and 3 years retired it's nice to touch base with my work life.
Boeing has a web site where they sell tee shirts, caps etc. it has a tab called Custom Hanger where they sell objects crafted from airplane parts.
Some of the engine parts are a mirror framed by a #5 bearing housing from 727/737/DC9 aircraft, wine table from a bladed up JT8D fan disk where the bottles are nested between the blades, bar stool using a rear compressor hub and a JT8D combustion chamber a compressor stator framing a mirror among other objects.
Guess I should be glad they're using these parts, I just hope they're not embarrassed by their new purpose in life
Excellent stuff they have there. I might try some of those smaller projects.
1:35 Is scent marking included in the price or does it cost extra? :-)
They are not fuel injectors, because they have no valve or any way of controlling the amount of fuel flow. They are called nozzles because that's what they are.
Interestingly, fuel flow is controlled by a device called the fuel control.
I do have a few videos posted featuring fuel nozzles in action being tested.
This is so much better than reading my textbooks.
Question, Looking at the J79 Combustor, it has 6 mixing air holes around the injector nozzle hole. You have compressed air coming from the compressor going through these as as well as the other smaller cooling holes. Is all of the air coming from the compressor going through these holes, or will some of the air bypass the combustor? It just seems like there is a lot of volume (of air) being compressed through these holes. Thanks.
I think I just found the answer watching another video, "Why Jet Engines Don't melt". I see that there are "pieces" to divert "Some" of the air. Anyway, great job, this is really interesting stuff!
it seems in your video's watching and listening gives me the answers I seek thankyou
the burner cans from the Orenda turbo-jet are larger than the J47 are these more powerful
or are they bigger for greater cooling air around the inner cans
this engine has really grown on me, I will try to find a small model to go with my RR Nene model but do want the Orenda and not a J47, thanks again AgentJayZ
Another great vid Jay. Excellent close ups. Question please:- What feeds all of them mixing holes to cool the burnt gases in the combusters? Is it from airflow around then engine? How does this work in a fighter jet set up? Cheers.
How does the shaft run through the combusted liner on the Pratt and Whitney j-75?
I was wondering if it was just one can, but good question
There are eight cans, so there's space in the middle of the array.
what are they made of ?
What does the flame look like, how far does it propagate from the low pressure area in the liner? Are any of these used combustors able to be placed placed back into service? What are the liners made of? stainless?
That was neat jay! Question, do the full annular designs still have a turbine inlet guide vane yes?
Thanks for watching?? Thanks for showing!!...
I have a Rolls Royce Derwent combustor liner. I was looking up info on it and found a really good PDF of an old Rolls Royce book called "Rolls Royce the Jet Engine Fifth Edition" that has some pretty interesting info on the configurations of the different holes on their liners. For curious folks, like myself, it's worth checking out for sure.
Yes, that book is one that I am always recommending.
You are providing very valuable information sir
like the video. reminds me of when I was in high school we had an aircraft maintenance shop class. makes me wish I stayed the course and went to a tech school.
Any footage of reverse flow annular liners? I work on PT6As and I rarely get to see internals upstream of the power section. ....well, without using a boroscope that is.
Great vid! Can we get some thoughts and a tour on that Yamaha SR sled in the background? Drool.
I was just wondering the area where the igniter is put for a commercial engine combustor, in replacement of the igniter is instead an oxygen acetylene torch. You light it with one of those strikers like in chemistry and the. Set it to the blue flame. Would it combust what was needed to start the engine
Great video !! Is it possible to update the jet engine , for example change a old model combustor chamber for a new ono of the same model of engine ??
Thanks for taking the time to show this stuff, it's fun to see.
What did you study, and for how long?
What is your role at that shop?
What kind of metal are those made of and why?
Some of those designs are very aesthetic, especially the one with 6 mixers. Others have some resemblance to the Dyson blade-less fan.
Thanks!
Hey ur videos are just amazing , I have been watching ur videos . Just wanted to know how many Ignitors and Injectors are present in an combustion chamber.....
Any Idea how those are welded together? I tried to modify one several years ago and it cracked at every weld. I was welding with inconel wire using argon shielding gas. This was for a test project at one of our universities so I dont know which model it was.
Charles
Top video. Always beautifully explained.
@milesall1 Out in the open like that, the holes in the liner would allow air to flow out, when in an engine air flows from the outside of the liner inwards. Your demo would be ultra cool if we could somehow make a combustor case out of glass so we could see inside a real running engine...
Hmmmm....
Sweet! Thanks Agent Jay!
Thanks for showing this is very interesting
Thank you very much !!!!
I never seen a real combustor in my life and probably never will... And had no idea what they look like, now, i know.
1/2 million $ for the annular combustor.... Me too, i'd let it lie on the ground...
How can someone make such a shape out of a nickel sheet? is it embossed? welded? or even soldered?
A combination of sheet metal forming, machining, and welding of separate pieces. It's very time consuming and exacting, so expensive.
I worked at manufacturing plant that focused on liners, burner cans, and flow sleeves with other miscellaneous parts. Its mainly buying a sheet and rolling it into a drum, then seam welding it, expanding it out, and then they'd all go on a big tool that was shaped to the parts specifications on a flow turn lathe and formed. From there, it got machined, and countless hours of welding the hardware into the part. I loved it
Sir, can u please tell, what is the purpose of the swirlers?
hello agent zay. i want you to deeply explain the combustion part---you have explained about the combustion liner but the outer part or the outer case isnt explained. awsum video
Cool videos !!!I am very impressed with them all.My job is closely related. I work at a laser shop, and we laser a lot of parts for the aerospace industry. I happened to notice one sitting on top shelf behind you at the beginning of this video and was wondering if you could show us where in the engine it goes.We call it an M08 and burn all the holes and tabs at the top of the part. Thank you keep up the awesome videos!!
Hi, in your video at minute 1.30 is seen your cat and a very small combustion chamber. Could you tell me which turbine from? And most importantly could send me a few pictures of it, I need to make something similar for one of my turbine and I like the design. I would ask the main measures of the holes, but I think it will be much to ask for. Thanks for your help
Very informative...keep up the great work,i look forward to your videos very much.Thanks very much
Merry Christmas...Bob
Yeah, that impressed me too. The most expensive stuff is that which runs hottest. and is subject to the highest force, ie, centripetal. So that means the turbine blades, and the mounting ring they sit on, followed by the stationary stator blades. They (engines) do actually last well, and I wouldn't call the maintenance minor or simple, but turbine engines have become a bit of a miracle of reliability, in view of the temperatures and forces, they don't fail very much. Exceptional engineering.
thanks my brother for all videos .
I believe the P&W liner middle nozzle you werent sure about is the secondary combustion nozzle, similar with GE frame 9E DLN-1 combuster.
thank you very much. that really help me with part66 B15
This was great, thank you for doing it.
Do the ignitiors spark continuously or do they shut off after a flame is established?
That's decided by the pilot, but normally the ignitors are turned off after the engine has been started and has reached idle speed.
I really enjoyed this evolution-peice!
Would it be possible to make more of them? like from J47 (or earlier) to the present on various parts?
I get that this was a rare opportunity, perhaps acquiring the footage of various parts over time could be a solution to that?
OK, I know of no bomber aircraft nicknamed lightning, so how about a hint?
Also, many aircraft are available with more than one type of engine... and here in Jet City we deal with engines... not aircraft.
So help me out, OK?
Have you thought about giving lectures to aerospace students or already done so? These videos plus some Q&A would go a long way