Rotating Detonation Rocket Engine passes long duration test
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- Опубликовано: 19 дек 2023
- A full-scale 3D-printed Rotating Detonation Rocket Engine (RDRE) was successfully tested for 251 seconds, producing more than 5,800 pounds of thrust, at NASA’s Marshall Space Flight Center in Huntsville, Alabama. According to NASA, “the RDRE differs from a traditional rocket engine by generating thrust using a supersonic combustion phenomenon known as a detonation. This design produces more power while using less fuel than today’s propulsion systems and has the potential to power both human landers and interplanetary vehicles to deep space destinations, such as the Moon and Mars.”
Credit: NASA
Rotating Detonation Rocket Engine hot fire test 
Наука
I've been following the development of rotating detonation engines for a few years now.
Amazing to see it come to fruition.
This needs to be talked about more. This is a demonstration of new rocket and jet tech that people even 20 years ago thought was impossible. This 4 minute run represents a huge gigantic leap in what new generation of rocket and jet engine powered vehicles can do. This doesn't appear to be just an rotating detonation engine, but also an aerospike engine. This are the kinds of engines that will be able to power atmospheric hypersonic vehicles or single-stage-to-space engines. Meaning, space that could get to space without having to use stages.
The next generation of fighter aircraft will likely use these kinds of engines, the next generation of spacecraft will likely use engines like this. This breakthrough, combined with recent breakthroughs in ramjet propulsion will be enable to atmospheric mach5-mach12 speed targets.
I think in the next 10-15 years, it's going to be unveiled that the US has been quietly working on this tech and is about to become a major innovation center in the US aerospace industry. I think now would be a good time to invest.
@TheModernHobbyist Material science has evolved as well so it's hard to say exactly what possibly classified programs have up their sleeve when it comes to hypersonic survivability of aircraft.
I read about this in a Magazine I get Tech... ;-D
Hypersonic vehicles are right up there with fusion as over-hyped technology. As @TheModernHobbyist said, there are already massive heat problems at just Mach 3. The exterior of the SR-71's canopy reached temperatures past 300 °C, and the interior, despite all the cooling mechanisms in place, reached 120 °C. This is while flying at an altitude where the air temperature is around -50 °C.
Push the speed from Mach 3 to Mach 5 and the heating increases by 178% (drag is heat, and drag squares with speed). Where are you going to put all that heat? Your options are: absorb it for a short duration then drop the speed way down to cool off, or ablative cooling which is letting the skin of the vehicle carry heat away by boiling off. Either way, anyone with an IR sensor will see the vehicle at any range. Ah, but what about sea skimming hypersonic cruise missiles - by the time they pop over the horizon they will be too close to react to, regardless of them glowing like a meteor, right? Well remember that the SR-71 reached speeds of Mach 3+ at an altitude where the density of the atmosphere was ~2.5% of that at the surface. Mach 5 in the lower atmosphere is absurd. Even if the vehicle has enough thrust to push itself to that speed, it will vapourize itself with the friction heating from the dense air.
I won't go into what happens if you heat the air enough to start ionizing it, but as a teaser: all sensors and communications become blind and the vehicle has to rely solely on inertial guidance.
With that logic, SpaceX rockets shouldn't be able to land at all. We thought a lot of things in the past were not possible, but yet they were.@@JonMartinYXD
@@JonMartinYXD it all depends on how long and big the engine is. You dont need to go Mach 3+ with this tech. Just as long as you can accelerate from mach 1 to mach 2 more quickly that means you can potentially out run missiles. also this tech could also help supersonic civil flight. Just imagine going from New York to Japan in 3 hours... mach 2 is doable with Concorde like airplanes. the reason why Concorde dint work because it isn't fuel friendly.
Congrats to everyone who had a hand in making it possible. 🍾🥂
That was like staring into a camp fire, I couldn't turn it off and when it stopped I was left with a "where am I, who am I" feeling. 🙃
🤑👉Perfect for masmalou and hot dogs with a long prospera rod.😉
Holy mother of Rocketry.. this is one of the best Rocket engine test ive ever seen.. ive never seen such a stable rocket exhaust ever.. the flame being white coloured looks so futuristic😮
I wonder if this will work well if scaled up
I have no evidence to back up my claim, but my Intuition tells me, these motors should be better and more predictable at large scale.
You can't scale up aerospike nozzles forever, as the surface area available for cooling scales slower than the energy output of the rocket. A Rotating Detonation Engine requires an aerospike nozzle, so there will be a size limit for these. Not sure what that limit is though.
So multiple smaller engine then..
Imagine these being mass produced instead of customized for each vessel..
That looks like a flawless long duration fire. This is amazing! Stunningly amazing!
Man I can fall asleep to this sound
This is civilization-changing tech. Amazing! Congrats!
This is a discovery only outshadowed by AeroGel and Scalar Technologies, which we've had for 90 plus years now.
Watching this on a 4k res tv with Bose surround sound to the max makes me excited for the future of this amazing nugget of innovation.
Most excellent design
Do we know what ISP that thing has? Cause this looks very promising and I really hope this and aerospikes will finally see some use on commercial rockets!
4 months to mars ?
It sounds so sick.
These engines are coming along. They seem to know how to start them at will now. But that looks like a lot of coolant to keep it running.
Hold a hair dryer in front of your face while watching for full effect.
Super efficient
Time for a test drive
NASA still the leader. What a triumph
russians done that in 2016
nah@@bagamut
No way that thing stayed on for tha long without melting 😯
This is art of technology.
The nozzle is cryo cooled.
The stopping the melting is the easy part! The hardest part is feeding fueling in front of the rotating detonation flame front.
All rocket engines use deflagration, basically the explosion that occurs is slower than the speed of sound, this motor is the first to ever use detonation, hence the name. Detonation flame fronts travel faster than the speed of sound, which creates a problem.
Basically, it's detonating a much higher energy dense fuel, which means less fuel, less weight, required for a similar thrust of a bigger deflagration liquid engine, but it's hard. With the flame front travelling faster than the speed of sound, by the time you go about feeding fuel to the detonation, the flame is already gone.
So, some have devised pulsejets which use clever fluid dynamics to feed a detonation cyclically and pulse the detonation. But we've never been able to feed a detonation continuously as the detonation front travels WAY faster than we can feed it fuel.
So, this is the result of decades upon decades of research and testing, hell, even 20 years ago it was thought to be impossible. What you just witnessed was a long duration test of a rotating detonation engine. They used a toroidal style injector plate to feed a detonation front from in front as it passes. So, those injectors are feeding that front in a circular rotating path.
And even crazier, usually the more efficient way to run one of these is with TWO detonation fronts or more, so the injectors are firing at 30K+ cycles per minute. And with 2 detonation fronts, they could be exceeding 60K-100K cycles per minute. That's 1000 to 1600 times the injectors inject fuel in front of the detonation to continue the flame front and produce thrust per SECOND to keep up with the rapidly rotating detonation front/s.
It's WAY more efficient, the fuels are significantly more energy dense, and the thrust is way more violent and energetic than your standard deflagration engine. Expect these motors to become the de facto motor in a few decades as the technology becomes more stable.
Smaller rockets with identical performance to today's huge rockets. All because we can use better engines and better fuels.
It'd be like seeing this video and it was a battery technology demonstration that outpaced lithium so well that cars like the Model S could have up to 1000 miles of range with no size differences, just new chemistry to store more electrical potential in a smaller package.
That's what this video is to rocketry. It's technology like this that will open up the flood gates for cheaper space travel for the masses.
We are finally closer to the SSTO machines
Yep! ;-D
The Bass Rocket 🤣
Interesting the feed tube to the outer face are not super cold, no frost but the base lines are. O2 to the base and H2 to the face of the nozzle, or the other way around.
Inconel based power matrix I guess.
Wonder how much wear in there happened?
It's made of a copper-niobium-chromium alloy that has a high heat capacity, high melting point, and is compatible with metallic 3d printing.
Amazing 😮
Traffic lights in the background? Where did this test take place? On crossroads? :O
Crossroads of innovation ;-)
Kindergarten school. Kids can't cross on red.
TIL Nasa has a favorite intersection
You noob, it's at the facility.
Gary, Indiana.
Cool....
Love this little monster here! I wonder how many rpms it's going 🚀
None, that's not how it works. It has no moving parts whatsoever.
I can't find any hard sources, but from misc comments, the wavefront of the rotating detonation is apparently going "faster than the speed of sound". The speed of sound is also very dependent on the conditions, so I have no idea what an actually calculated RPM would look like, but it's very fast.
@@justinmorgan2126 the detonation wave has an RPM lmao, it goes in circles & the speed at which it does that is significant.
@@nixnox4852 it has to go faster than the speed of sound, because it has to match speed of the detonation flame front, which by definition exceeds the speed of sound.
In a previous published video a 3-inch aperture engine had a rotating wavefront of around 30K rpm. There are at least two simulteneous diametrically opposed wavefronts .
WOW!
Where can i purchase
Годнота, за ротационными детонационными двигателями будущее ракетоносителей, а вот на дальние расстояния лучше электрическая тяга на ядерной энергии.
С нашими технологиями да , но если говорить о перспективе то лучшим решением будет лазер т.к с его помощью можно ускорять топливо как из пушки на огромных скоростях.
@@user-dd4ir7lj1r Да, если научиться выбрасывать рабочее тело со скоростью света, это позволит летать даже к ближайшим звёздам, за десяток другой лет.
Does the green flame at the first shock diamond indicate engine rich exhaust or is it just the fuel?
some ignition fluid mixtures burn green, I forget which exactly but you can see it on a lot of American engines at startup
@@Tuxfanturnip That's TEA-TEB but it's usually only a quick burst at the start. It shouldn't keep happening, I wouldn't have thought.
oh, I must have missed it later on.
Better than Raptor, finally!
What was the ISP for this burn? Any one know...or thrust per wight ratio?!
No idea on ISP, but I can only imagine the answer to that is "really high" and for theust-to-weight, that's impossible to answer. There's no weight to consider here as it's a test stand. That makes more sense if it's a rocket that has a pre-determined initial and final weight.
What pressure is the fuel supplied to the combustion chamber at? In other words, what are the implications for turbo pump design and configurations?
Deep cone?
What fuel/oxydiser was it burning?
Looks like hydrolox😊
Based on the fire color either hydrolox or methalox
it looks extremely cool
Pretty sure it’s producing thrust subsonic
Watching this again, how in the living hell is that thing not glowing bright red when it shuts down?
Lots and lots of active cooling.
Can't wait for Honeywell to put this on the new Tomahawk.
A constantly detonating, supersonic stream of superheated rocket exhaust. I can't even begin to imagine how noisy this is
The exhaust isn't detonating, the detonation stays within the combustion chamber.
This just a small rocket
Imagine it was big and we can make it more bigger
Having a ship a size of manhattan building would be an enormous achievement
would love to see a decibel measurement :)
“ it’s over 9000!”
You look at the decibel meter and it just gives you a firm "YES!"
The detonations are so rapid that they sound like static.
I believe it's one continuous detonation rotating around and the static sound comes from the microphone getting blasted with more sound then it could ever hope to cope with.
Jet engines have a high pitched sound that I believe comes from the faster jet exhaust in the cone recombining turbulently with slower air. This exhaust is faster so I am speculating the whine is more pronounced.
it IS static
Super idee, ale konkurencja nie śpi jeszcze bardziej futurystyczny napęd ERAP już zaczyna nabierać kształtu. a ten silnik strumieniowy to następny demonstrator technologii no i brawo tak trzymać NASA.
What's the temperature inside the chamber?
3400°
What kind of fuel? What Isp?
Hydrogen
👉Perfect put it on the spacex starchip. 👈👀👀
What kind of fuel?
Hydrogen and oxygen.
Does this thing need to run always at full throttle?
Is already possible to tweak the trust?
Not nearly to the extent that traditional engines can. But that probably won't matter so much, since these engines really only make sense for take-off anyways.
China tested a rotating detonation engine in a scale model of an SU 34 last year, so i guess they are throttleable
@@piccalillipit9211 For the nature of this thing, the shock waves needs to have right space between them or this thing dust drowns, or loses pressure. But who am I to know something about it
@@pedro.alcatra IDK.
You would probably need to control the speed and stability of the detonation wavefront. I am guessing that maybe you reduce the fuel but then the wavefront(s) become more unstable and harder to control. That seems like a tough problem.
we controlled deflagration, now we control detonation.
Perfect for an AIR LAUNCHED space plane! I think Strato Launcher has a future!
Longest run so far
its kind of the scramjet of chemical rockets
A lot of fancy corporate words here, but what is the actual Isp (specific impulse) of this engine?
"This design produces more power while using less fuel than today’s propulsion systems" ... sure, but what are the numbers?
Could do with knowing the size too - looks bigger then a Curie and smaller then Rutherford, no where near the size of Merlin or Raptor - how does it compare for motor mass compared to thrust? How long can it run at full rated power before failure? Can the technology be sized up to match a Raptor or bigger? Is it better in an single motor arrangement, or does it scale like Stoke Space's engine, but in to a supersonic combustion virtual aerospike?
I had seen a video that mentioned a 5% increase in ISP, not sure if that's the actual number on this one though
Yep!
From what I understand, the design currently relies on a HUGE air compressor to generate supersonic input flow, the combustion amplifies and maintains the shockwave. Any efficiency numbers you might see dont account for the total weight of the systems involved in running the engine.
Please correct me if necessary.
There is no air compressor. The oxygen is provided in the form of liquid oxygen. @@Pyroteknikid
Почему свет белый? На водороде?
这是颠覆性的技术，比传统的飞机发动机燃烧更充分，温度和推力也更高，比俄罗斯的高超音速导弹发动机先进多了，不过视频中声音不对，应该是尖叫声
Ну там либо кислород или водород короче тупиковая технология, для ракет может и пойдет вот с самолетами будут проблемы.
3 фактора.
Огромная температура
Полное сгорание
Большее содержание топлива чем окислителя(этим он и выигрывает , если обычный двигатель работает на 35% , то в этот можно вплоть до 60% закачать.
To infinity (or Mars)... _and beyond!_
Rotating Detonation = ... impulse power?? Life imitates art?
I have so many questions, I'll need to build my own to answer them all.
Odd,.. not seeing any Mach Diamonds in the plume.
I also thought that was odd. Per wikipedia, "Shock diamonds form when the supersonic exhaust from a propelling nozzle is slightly over-expanded, meaning that the static pressure of the gases exiting the nozzle is less than the ambient air pressure." So maybe the gasses exiting the nozzle are at a higher pressure than usual?
I guess the aerospike nuzzle plays a role here?
@@Matthew-lh3zy Or, the gases are at higher pressure then the atmosphere?, which would not be surprising for a motor that detonates it's fuel.
Они тут есть. Присмотритесь на старте
The exhaust is comprised of tens of thousands of smaller shock events that exit the nozzle in a helical pattern, so closely packed together that the pressure waves blend into one continuous flame gradient.
I can see some "hot spots", though Im not sure if they qualify as mach diamonds.
Выглядит не плохо. Но что за газы, выход которых все наростает? А так почти догнали нас.
А где видео вашего можно посмотреть?
If it’s a hydrolox engine, the bulk of it should be water vapor. It is the cleanest burning fuel mixture available
@@rasimbot Видео 7-8 летней давности. Некоторые видео даже в новостях исчезли. Но послушайте нудоль, звук уж очень нестандартный
@@CTARuK | Причём тут Нудоль?
@@rasimbot Звук говорю интересный. Послушать предлагаю. Считайте оффтоп
Shouldn't it make a screaming sound?
Bravo.........lot of drama.......wow........does it rattle ur teeth loose........cheers
*NOT SAYING THIS IS NOT FANTASTIC* but you all know China flight tested one last year right...???
wikipedia.org/wiki/Rotating_detonation_engine
@@SciNewsRo OH YES - THANK YOU - "Earlier in 2023, China achieved the world’s first RDE drone flight. The drone successfully flew at an undisclosed airfield in Gansu province. The FB-1 Rotating Detonation Engine was developed jointly by Chongqing University Industrial Technology Research Institute and private company Thrust-to-Weight Ratio Engine (TWR).[26]"
@@piccalillipit9211I guess specific for drones because Japan already used them in space.
@@carlosandleon This is not my area of expertise. But I guess you are correct.
00 Raiser "likes" this video. IYKYN
I wonder if Elon is watching this?
Elon will buy up all these engineers and promote it like it's his innovation, same as he did with EV's and reusuable rockets. 😂
@@charlesdjones1 Truth
so theyre not gunna explain how it works? that was 4 minutes ill never get back. thanks for nothing
why so hostile lmao
Read up on this in Popular Mechanic Magazine and Popular Science Mag too..
You wasted another minute typing that useless comment. Congrats.
Do your own research fool
You can always Google it lolol.
But I'm not rude, so I'll explain it in somewhat simplified terms here.
In short, what you just witnessed on video is revolutionary. All liquid rocket engines to this point use slower than sound flame fronts called deflagration. You don't detonate rocket fuel, it deflagrates. This allows you to pump fuel into a combustion chamber, generate pressure, and then exhaust it out of a nozzle for thrust.
With detonation thats not possible. The flame front travels faster than sound and you can't feed it fuel fast enough in a combustion chamber to feed it. It'll just poof out.
So to dumb it down, this thing is feeding a supersonic detonation front in a circular rotating pattern with a toroidal injector. It's been long thought to be impossible, and we finally have a functioning test stand version that just lasted 4 minutes with no obvious failures.
These engines are hugely more efficient than your standard liquid engine, so less fuel, more thrust, and higher efficiency. Less weight for a similarly performing rocket first stage. This will make SSTO (single-stage-to-orbit) vehicles a possibility and a reality.