How the General Electric GEnx Jet Engine is Constructed
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- Опубликовано: 29 сен 2024
- A good overview of how a jet engine works. This specific example is the General Electric GEnx that is used on the Boeing 787. This animation was produced by General Electric.
I like the way you put all these together...
These new technology engines are really sophisticated.
want one?
I agree with you
It's Like No Other.
Can You Just Imagine How Amazing All Of Our Other Parts Are?
This is an overview of the General Electric "GEnx" engine, or the "Next Generation" turbofan; the title is misleading. For people with a basic understanding of turbine engines, this video shows how GE is making improvements. For those that are not familiar with turbine engines, here are the basics:
*On the ground, an electric or air powered starter is used to get the engine to start spinning. The engine (front to back) consists of a fan, a compressor, a combustor, a high pressure turbine, and a low pressure turbine. It is called a turbofan because the second turbine spins the fan to generate thrust (move lots of air).
*When spinning the compressor pressurizes air and moves it toward the back of the engine. Note that the pressurized air is hot.
*Fuel is added and mixed with the hot air in the combustor, where there is also an igniter. The combustion gases expand and accelerate out the combustor and through the turbines.
*The high pressure turbine (HPT) is connected to the compressor by a shaft, so spinning the HPT is also spinning the compressor. Note that the compressor, combustor, and first turbine are the engine 'core' - the components responsible for keeping the engine running.
*The low pressure turbine (LPT) is connected to the fan by another shaft (here they are counter rotating). So spinning the second turbine is also spinning the fan at the front of the engine. The fan provides most of the thrust. The turbines are on different shafts because the HPT and compressor spin really fast, and the LPT and fan spin slower.
The engine powers itself once it is running as long as fuel is being added. The parts are spinning, not reciprocating like a piston in a car engine. The forces in a spinning engine are more constant or 'steady state' and the parts are moving in basically one direction (circle) which is part of what makes turbine engines so reliable. 'Things in motion stay in motion...'
Joe how does the jet compress the gas, explode it and move it into forward motion in a controlled and safe manner?
J M u
Big thanks to JM on this overview. Cleared some of my previous misunderstanding of the jet engine concept. I think the big fan in front, turns by shafts from HPT and LPT, moves the air towards the back to generate thrust. Might be slow on start but once regulated fuel/explosion comes in, the airflow becomes vastly exponential from repetitive/powerful turbine actions. Correct me if I am wrong.
@@vidjdwhite You have just hit the nail on the head there, sir !! This is NEVER explained but I will now try to explain (but it's only my version that may not be totally correct).
Any fan / compressor has what's called a `fan curve' (also pumps have pump curves) to illustrate how it will perform when the flow rate is varied i.e. how the pressure across it will vary as you vary the flow.
Invariably as the flow is decreased the pressure across the compressor INCREASES; therefore during start up of the jet engine when the burner is switched on the pressure after the compressor stage increases which will tend to reduce the air flow into the compressor but this reduction in air flow will increase the pressure gain over the compressor so a new BALANCE is achieved with the burner on. Google `fan curve'.
With the burner on this vastly increases the volumetric flowrate with the pressure reasonably stable.
The same can be said for a locomotive steam engine - with the boiler sitting at e.g. 10 barg (145 psig) and zero steam take off the fire only has to supply boiler heat losses. Once you start to draw steam off the fire has to provide a lot of heat to maintain the steam flow rate at the same pressure.
It is indeed an exciting experience to see the 3D use in explaining the assembly of such sophisticated new age Engine of Flying Machines. 🤗
More like a sales video
LastAvailableAlias and
LastAvailableAlias General Electric is a job killer.
+James Henry Smith
Not a generator. It’s an internal combustion engine.
IT IS YOU IDIOT
Where the GE shines, is on my favorite, the B777-300ER. Great engine and airliner.
This morning i woke up without knowing how a jet engine works, after watching this i know a lot and i will sleep better to night.
Tomorrow watch porn and the next day you will wake up after the best night of your life
@@ahsanafzal48 All porn does is make you want to find somebody who you "may" never find to solve your loneliness. It does not work.
@@ahsanafzal48 yeah, that's because you've been there too.
@@ahsanafzal48 snooze, snore, snooze, snore.
Mr. PilotTroll: You are right 100%. All light bulb manufactures, more than 80 years ago AGREED to limit the life span of each incandescent bulb to NOT MORE THAN 6 MONTHS. The only incandescent bulbs that last (almost) forever are the ones used by the subways (MTA) in new York City (as far as I know) and those bulbs have the thread counterclockwise, so nobody can use them, unless the socket is available. with counterclockwise thread too. 02/17/18.
Anyone notice him saying repeatedly “This Amazing Engines” ?
I am full a of amazings in my head, need to meditate to forget it)
Basically an encased turboprop using light weight alloys, composites, and sensors. Put some automatic directional and output controls on those burners if you want more efficiency.
Saw the engine and thought of one thing. Podracing.
Look up "Ody mandrell" or "Clegg Holdfast". Their engines look like this engine :P
kkk ?
I see it too haha
lol same here
Marshall Husvar like star wars right
I'm not a specialist, but I do strongly believe this is a GE engine.
Alban Pema It’s a GE-90-115B
American 015 I was joking tard
Wait,fuck
Haven't work on one in years, but having worked on GE, Pratts, and Rolls Royce/ Allison. Ge was by far made the best. I was impressed that GE made their engineers actually work in rebuild factories before they were allowed to design. They learned to make things easy, murphy proof, and modular. It appears they're finally taking advantage of material innovations and modularity design v. high time components, excellent applications. The next innovation will be extending material life of expensive components like high speed turbines and combustion chambers from breakdown by thermal cycles. Right now they keep the engines running almost constantly, but that can be changed. GE, call me.
yes. both have the same principle in burning but differs the propulsion. a turbojet, the propulsion is by its exhaust while in a turbofan, the propulsion is by a fan.
GREAT SCOT, THIS IS HEAVY DOC.
Its a product definition than a jet engine tutorial.In normal jet engine after combution the expanded gase rushes out making the power fan turning to continue shaft turning and pushing the atmosphere behind to make thrust.But adding extra fan will develop torque to rotate shaft but the ubstration of gas flow will reduce air pushing thrust out side.It will be useful for automotive purpose where torque is necessary no thrust. required.
As long as airlines follow the manufacturer maintenance guidelines, and don't use shortcuts like American did in 1979, it should be a very good trouble-free engine.
I love it! Thi is the type of animation I wanto to make in the suture
السعي الحقيقي للكمال مدعاة للتطور المستمر (سبحان الله ) علم الانسان ما لم يعلم
Much better than the J-52s that I worked around.
I've had several replies to the question. You can read them below. I'm not sure torque is the issue since the engine on one side of the plane spins in the opposite direction of the other. It would cancel out and maybe even add stability like a gyroscope.
So simple! I will make one now.
Sorry but this is not really "How a jet engine works" ... I can only raise my middle finger
Because if all the stages would be rotating the same direction, the air would start to whirl up and therefore reducing the differencial in speed between the other blades, making it just use up energy sideways but with a "backflow".
This is not entirely a jet. It's a turbofan.
Super video... thanks...
If they build jet engines like they build washing machines then count me out. I'll stick to driving :D
Hoy Shit! There is a lot more involved in a turbo engine than I ever imagined!
I still don't understand how jet engines work
The air has lesser space each paddle, and because of the high speed it cant go back but gets pushed forward. Than the paddle hits it and twist it -> than that mixes and burns, and all that tries to go out, in an even narrower hole, which pushes the plane forward.
***** *Newtons third law is: for every action there is an equal and opposite reaction. Newtons second law is: Force = mass x acceleration.
its simple just remember these steps sucks air,squeezes it,combust,and exhoust
Magic.
PixelCortex AFAIK, schematically: compressor, combustion chambers, turbine. A jet engine takes a certain amount of incoming air in the unit of time (the flow rate is a volume in the unit of time, like m3/sec ...) and then accelerates it to the exhaust. The greater is the accelerated flow into the engine, the greater will be the thrust. The combustion chambers accelerate the airflow like an explosion (air and fuel). For amplify all this, the output flow of the combustion chambers hits the blades of a turbine. This turbine spins a compressor put in the front of the engine. The compressor further compresses the incoming airflow for the combustion chambers, further amplifying the incoming flow rate, so amplifying the thrust. Modern turbofans have also a fan keyed on the shaft of the turbine, like a propeller. This fan is run by the turbine. The fan works in the lower atmosphere (take off and climb), where the air is more dense, like a very efficient propeller; while the jet works better in the higher atmosphere. This combination increases the efficiency of the engine and decreases fuel consumption.
That makes sense. I guess the only part that seems counter-intuitive is that the air wouldn't create more "back-pressure" due to it leaving the engine at a slightly slower speed and therefore slow down everything upstream by a proportional amount.
I don't know if that makes any sense, but that's how it works out in my head. I suppose the secret is a happy middle.
It shouldnt create backpressure if the mass flow is the same, velocity just depends on how far its compressed i guess
very good explanation. its easy to understand.
I would like to know does it required any external power to rotate the fans in the initial stage. how it starts spin in the initial stage.
Very nice
state of the art............awesome
Just imagine how weve improved the ther parts of this amazing engine
The technology really is amazing - I've been on three flights that had total engine failure years ago - Today you have airline pilots that go their entire career without shutting one down - I've been on over 1800 airline flights and been in 6 emergency landings - no big deal then, today you make the 6 o'clock news if you need to go abort a landing (been on 4 of those - never an emergency thou)
Wait... So, this is just a giant ducted fan that is spun up by a jet engine? Its basically a prop plane on steroids? That blows my mind.
so the thumbs down are the ppl who can build a better one than GE i assume
right
I think I understand. Basically the whirling air coming off the first set of turbine stages would be spinning in the same direction as the second set and therefore wouldn't produce much work because it would just "slip through".
Is that more or less what you mean?
So is the air flowing through the fan providing most of the propulsion or is most of the propulsion (thrust) coming from air flowing through the core? I think that's what most laymen don't understand, and need clarified. :)
I can simplify this FAR more:
How does a jet engine work?
Pretty well, most of the time.
How's that?
Where can I get the script for this video ? The subtitles are not automatically generated
@ 7:8 low pressure turbine.... how does the counter rotating design work?? the connection.. with the Low Pressure Fan Blade infront??
This is "How the advertising of jet engines works"
Magnificent free energy generator. Where can I find a small scale version
The largest fan which is in the front seems to push air around the outside of the engine. Does that air on the outside also provide thrust? And if so what percentage of the thrust comes from the outside airflow from the large fan?
sweet they're finally making POD RACERS!
I was thinking that the spiral flow off of the main turbine was causing the second to not be as efficient as it wouldn't produce as much pressure against the turbine blades, but are you saying that the only increase in efficiency is the propulsive thrust generated as it leaves the engine? It makes sense now that I think about it. Could it be a combination of the two that adds efficiency?
very good well done in tec world.
I put General Electric on my black list for *anything* in 2002, after buying an answering machine with a KNOWN bug, commented in the instructions manual: "If it stops answering calls switch off (unplug) and on again", regardless that fact that you might be 12000 km far away. Finally I decided not to rely on General Electric stuff any more, I slammed it against the wall. When I fly, I'm always curious about the engines brandname, and veeery happy that so often it isn't GE, synonym of bad quality.
первое видео, где на 3д реконструкции, лопасти турбин, идущих сразу за вентилятором имеют наклон в правильном направлении, такое впечатление, что другие видео делали в одном месте, с одной и той же ошибкой. Или я чего то не понимаю
I think GE is innovative and a money saving choice, but RR builds reliable engines.
wow great question! I was thinking about the same
Great. where can i get one?
verry good
Misleading title albeit still an interesting video.
What software was this model made in?
+MrEe1010 maybe automation studio.
A HIGH-BYPASS Turbofan, at that! Nacelles don't fool me....
Who the leader guys in the jet engine market? GE or RR ? Be interested to know
nice
How Long did this take to render on 3ds max?
i heared that the price of one blade in that engine is like the price of a luxury car ... but how much exactly ?
nice engine
How often are the bearings on these engines changed? And how long does that take?
+eJacob Cornelius - Engine bearings in a jet engine are not typically replaced purely on a timed cycle. What they do periodically is to withdraw a sample of engine oil from the engine and analyze it for metal content. If the metal content suddenly rises that is an indication of an impending bearing failure and the engine must be disassembled and all the bearing must be inspected and any bad ones replaced.
How long that takes depends on which bearing it is and where inside the engine the bad bearing is located. Jet engines I am familiar with used to take 2 to 3 days to completely disassemble them and then 4 to 5 days to reassemble and test them before they would go back into service.
but how does a jet engine work?
wheres the expansion?
More like a commercial advertisement than a technology course.
can someone explain the counter rotating part please!!!
good
I agree. It's infomercial.
That music holy shit
It's pronounced TURBINES you dummy, TURBANS are a form of headwear common amongst Sikhs
Thank you! As an American, I'm getting REALLY tired of hearing Americans mispronouncing such a simple and established word.
After watching this ad, i want to buy a GE jet engine for my family.
Excellent promotional video. However, it would be much better if the narrator spoke in normal conversational English rather than with the breathless tone s of awe and excitation that are frankly ridiculous.
This video is more of an advertisement for the GEnx then a video on how a airplanes engine works.
Just imagine what they were able to do with other parts of this amazing engine.
This advertiser is simply using advanced graphics and stilted language to distract you from the primary take away message: The environmental extremists comprising the all powerful EPA have overhauled the global emission regulations and standards to the extent that all power plant manufacturers have to design entirely new engines to comply with regulations created with the intent of punishing the participants of internal combustion technology. The advertised product is simply what GE had to do in order to survive as a player in manufacturers of gas turbines in the EPA's "brave new green/clean world." The alternative would have been to spin off that segment of it's operations.
Accordingly, this well-pitched turbine powerplant will cost many orders of magnitude more to acquire and maintain than any of it's predecessors just five years ago. Wouldn't it be nice if this were the end of the story, but it's only the beginning. The EPA took special care to ensure that internally-combusted power come at a much steeper price, and that's only step one. Just a fashion of similar fanaticism, our friends at EPA made sure that not only would new petro-chemical powerplants be uber expensive, but that they would also lag far behind the performance parameters we have become accustomed to as a society for sixty years running.
Put a tad more succinctly, the EPA has launched a full-frontal assault on everything that used to be "sexy" about gas-burning engines. If fast, loud, and powerful are adjectives that hold positive connote with you, then you're in for a big disappointment. The elite intellectuals of the EPA are going to see to it that you, me, and we are all going to "enjoy" jet powered aviation at a much higher cost, with a performance suite that is the rock bottom minimum necessary thrust component to keep us in the air. Sexy IS ain't what sexy WAS. Forty years ago, a typical non-stop 600 mile fliJht was comprised of a 727 which was really fast, really loud, and kicked out a little black exhaust trail behind her. If you went wheels up out of GSP, you'd be touching down in PHL in only slightly more than an hour. Today, hat same non-stop flight takes nearly two hours. Progress? I think not.
Flying today is akin to animal husbandry. No longer considered to be urbane, or adventurous, it's torturous. We don't make out way to the gate, but rather, we are hearded there. We don't check in anymore, we're "processed," like so many head of cattle. And that big 'ole jet airplane....that Steve Miller sang of in 1974 has been supplanted by fleets of puny, new, slow (barely) jet airplanes. Here's a tip for you frequent flyers spending hundreds of hours vacuum packed in regional jets: there are more than a few single-engine turbo prop air craft in the general aviation/civil aviation world that regularly cruise at speeds considerably higher than the 350 knots cruising speed you'll max out at during your 1-3 hour flight in your CRJ. That's not to say that your CRJ can't outrun the GA turbo-prop, it's just not ALLOWED to, thanks to ATC and the FAA. It's all about traffic management and keeping them separated up there. The only chance you'll get to experience airspeeds of 500+ knots in a regional jet these days is if you're on a non-stopper with a 400+ mile distance spread b/t departure and destination (and if your flight plan takes you over lesser-congested air routes (vis a vis: out west). We are unwilling converts into the cult of man-caused climate change. It was fun while it lasted.
if this is how you spend you free time, do you want come over and help me on some essays?
Walton Jackson same
Goddamn, this comment speaks utter bullshit to me, Jesus fucking Christ...
I watched this video "How a jet engine works" and I still don't know how a jet engine works.
Yeah, it's misnamed. It doesn't really explain how jet engines work. A better title would be "How a certain company's new turbofan engines are better than anything that came before."
(The name of the company of course, is very hard to detect from the video -- you have to look and listen very closely.)
Captain Quirk The name is very hard to detect from the video? The narrator must have said "GE" at least a 100 times in this video.
Vijay Purbhe: Oh my God, do you not have ANY understanding of sarcasm or irony? Please, get thee to a dictionary -- right now!
My bad, I am usually good at catching sarcasm but I had just finished watching Sheldon on BBT :-)
Vijay Purbhe Ah, well THERE'S yer problem! His extreme nerdiness is rubbing off on you! ;-)
jet engines are similar to a human eating an xl burrito with lots of chopped up habanero peppers in it. air goes in, its compressed, heat is added for more oomf, propulsion occurs. BOOM
LMAO
exactly :/
Rolls Royce all the way!
Yup, you got that right. A guy in airplane equipped with Rolls Royce engine pulls up to another airplane that is also equipped with Rolls Royce engine and said to him, " Excuse me, wouldn't you have a grey poupon?"
just imagine what they were able to do with other parts of this amazing new engine
Hurray ! - 0% bullshit !
now imagine what they were able to do with other parts of this amazing new engine
Are these engines donot have pistons( or piston engines) which rotates the fans????
Or how this engine start??? Is it just by burning fuel ????? Is no piston engine required to rotate the shaft???🤔🤔🤔🤔
on start up, you use an external power source like compressed air to spin the shaft. Once the air is flowing, you inject fuel and burn it, it expands fast and that drives the turbines (like a windmill) which drives the shafts on which the compressor and fan are attached
This is just a long commercial.
holeskoj didn't tell me anything about jet propulsion
@@davidvance6367 it wasn't suppose to stupid!
but NOBODY has ever explained why the fan spins....
LOL!! Really?
Assuming this wasn't just a joke....OK, look at the video again. at 0:55. See that the Fan ('N1') and the LPC (Low Pressure compressor) are attached to the same shaft? Then, farther back in the engine (at 1:55) is the LPT (Low pressure Turbine). These components are connected together front to back, and rotate together.
The center components (HPC and HPT), where the higher compression takes place, and the hottest and most pressure of combustion, these are turning together, on concentric shafts.
BTW, the engine is started by turning the "center" part (the 'N2'), and this has been done traditionally by compressed air (although the Boeing 787 uses an electric starter). As the N2 section begins to turn, the airflow it produces then causes N1 to turn...and the Fan of course.
767Captain I still don't understand, are you saying the starter spins the main? shaft which spins the fans to pressurize the air and then that pressure keeps it going?
RCcrAzY1234
To start the process, an electric motor (starter) spins the blades, so the compressor starts to compress the air into the combustion chamber (compressed air is hot) where you add fuel. The mix ignites and the propulsion spins the turbine blades while exiting. Because turbine blades are conected to the compressor blades by a shaft, the propulsion turning the turbine is now turing the compressor as well. At that stage the electric motor is turned of and the jet engine is turning on its own.
note: the compressore blades are in the front, turbine is in the back. But all are on the same shaft. The propulsion that spins the blades is pushing the engine forward when it exits in the back so it has two jobs, turning the engine and pushing the plane forward. Hope it helped.
The spin is to inhale anyone who ignore's the danger. I was in an Intruder squadron with the P&W J-52-P8A/B. There is a fascinating video here that shows a Navy crewman getting too close. He was very lucky.
TheDustysix A reciprocating engine uses mechanical energy that goes up and down and converts it to a rotating shaft. A turbine is already spinning, therefore no silly up and down. The whole jet engine theory, in the US, was when one looked at the schematics for the Lockheed P-38 and the Republic P-47, with there superchargers, turbochargers and intercoolers. The reciprocating engine merely got in the way. It is not necessary. In aviation, it gets tossed.
Great so the cost of my airfare will also be reduced???
I doubt it, friend. xD
ha ha ha, i laughed at that too, thinking "you mean your profits increased" :)
Geoffrey Field a
I have never been able to afford the cars they show in commercials on T.V...
But I'll take two of these engines. I have a shopping cart they might fit on.
What Engine is it !? GE ?
It's hard to tell from the video.
they were being sarcastic.
I love your movies ted striker
My challenge to the commercial airline engine manufacturers is this: to create a very powerful jet turbine engine which can easily and SAFELY break right through the sound barrier with as low friction and shaking as possible. Once this can be achieved Mach 1 or 2 and perhaps 3 could dramatically reduce travel time globally(internationally). The problem may then be the massive heat produced by the engine at speeds above Mach 1 or greater. Can the engine be cooled within the casing thus preventing overheating? How much bigger would the turbine need to be including the casing? Velocities which can top the speed of 1 time zone per hour would be great and closing in on 2 time zones per hour would be astoundingly amazing. Crossing the Atlantic Ocean bound for Europe in 2 hours from NYC or WDC to London or Paris would be quite an aviation feat. Indeed. SF or LAX to Tokyo in 5 or 6 hours would be fantastic.
we're perfecting traveling in our own atmosphere. i wish i to be alive when we perfect space travel.
ungratefulmetalpansy
what a waste of 3rd rendering i learned nothing
Maybe it should be in the title that this is a sales commercial for GEnx rather than an educational movie... Btw, is it not the GEnx that stops working during thunderstorms? Think I prefer RR Trent XWB in that case (anybody that knows how this one is performing compare to GEnx in other ways?)
"Imagine how much we've improved the REST of the engine.."
Dude... stop saying that.... I don't have to imagine... you're about to tell me.
They only thing one remember after this film is the "GE"....
Not JET but TURBO FAN engine
turbofans are jet engines
Older model jet engines relied heavily on exhaust propulsion system (waste of fuel energy) instead an ergonomic design of higher bypass fan blade ratio, smooth lines, exhaust gasses elliptic motion and preferably cryogenic air cooling system. Definitely the lesser in number slower moving wider 3D S shaped fan blades is the ultimate in efficiency. Added with a silence system necessary to the majority of large jet engines. Excellent achievement enhanced by the new age materials and manufacturing techniques. Definitely a safer, eco friendly, reliable, economic, and quieter way to fly.
@@vasiliostheodorou4849 Yep I agree. I even left my humble opinion "upstairs" before I read yours. It's the design of composite materials combined with large fan blades that simulate a propeller that has a special "three gear gizmo" that allows the energy to be safely transferred from the jet portion to the fanjet portion. The guy who designed the "transmission" should receive a Nobel prize, IMHO
This isn't how a jet engine works, it's an ad. Rolls Royce are better in any event.
lol. rolls royce. Their engines are terrible. GE or pratt and whitney arw far superior. Besides rolls royce are predicted to go out of business ince chinese perfect manufacturing as their engines are of such poor comparitive quality
Nick Magee - Brown Laughs ;-) Are you a propagandist for the Chinese?
Not on this side on the pond...GE works better
***** no need to worry. Rolls Royce are a tiny company and their engines will never see an american plane.
suck squeeze bang blow. what makes you think Rolls Royce is better ? can you give us some time on wing or cycles between overhaul . what are you basing it on ? we have some pretty smart people HERE in US. and it is how one works(simplified for the public)
Just wasted 13 minutes and 40 seconds of my life
Correction. General Electric is the leading manufacturer of aircraft engines ( Rolls-Royce is second ) and dwarfs RR in every other way. GE also holds the record for world's most powerful commercial engine ( GE90-115B ), and the B747 utilizes engines not only from RR, but also Pratt & Whitney and GE, including the latest GEnx.
This isn't how a jet engine works! It's a business presentation to persuade air line companies to purchase GE's new engine. ". . .your enginess?"
But, but, how does it work?
this is a advert not how it works ???
Exactly. I'm not going to buy one.
This sounds like a prepaid commercial, but for who, us? Ok I will order a couple of these engines for my bike.
Boooooo