Capt. Tylor Rathsack from the Air Force Research Laboratory - AFRL and his team discuss the Rotating Detonation Rocket Engines (RDRE) and conduct a live demonstration.
Only reason we’re watching this is cuz the chinese is well informed bud😂 If you didn’t know, this livestream is more just a proof of concept. This detonation has been explored almost as long as ICE engines have existed
As someone actively simulating this kind of engine. Supercomputing isn't required but does increase res significantly. Plus we've only developed the codes for simming detonation cells in the last 10 years. I use ANSYS
Any mechanic’s watching also thinking those high frequency pressure sensors would be handy? Live monitoring of cylinder combustion would be nice data to access! It’s something only the upper echelons of development get to play with.
It's amazing that this is technically a rocket engine even though it burns jet fuel. Is the "rocket" designation applied because the fuel is detonated? Or because it doesn't use compressors and fans like a jet engine does? Is there an afterburner capability?
A rocket engine is just an engine designed for a rocket, and most rockets burn a more refined jet fuel, RP-1, this engine however uses hydrogen, which is why the flame is orange, it's the water vapor glowing in the exhaust
General Rathsack, Dr. Lietz, Dr. Bennewitz and Dr. Burr, if they are not already, should be the highest compensated members of our military. That would be how the air force could recruit the greatest minds. It's a fact, when a person doesn't worry about small things, like money and bills, their mind is free to create.
I wonder how do you measure thrust with that type of engine? And do you control the thrust by controlling the size of the ring, or is it the amount of fuel put into the engine? Can you even control the fuel flow rate or is it set to flow so much fuel by it's design and that's it? How would this engine compare to say a Saturn V F1 engine of equal size? I have soooo many questions.
Very interesting!! What numerical method did you use to develop the simulation? Finite Element Boundary Element Finite difference Or some other method Do you solve the Navier Stokes equations coupled with thermodynamics? Any other equations governing the physical phenomena? Thank you very much for posting a video like this 💪💪
Interesting. A few questions: 1. Would this be air breathing in the real world? Like not carry its own oxidizer? 2. Would the geometry need to be movable/variable to be able to operate under different atmospheric conditions? 3. If it were air breathing, I wonder how susceptible to fouling or erosion from dust or dirt or water? If it "ingests" a bug, would that get instantly incinerated, or would it disrupt the rotating detonation? 4. Maybe you'd have some kind of screen or way to limit the FOD, but that would also create a drag/power penalty.
Why dont you divide fuel injection in combustion chamber to for example 12 rotating sections and turn of one off to take control on how detonation wave is developing?
Pressure. The fuel lines have to be significantly higher pressure than the combustion chamber to stop any flame front working it's way back into the tanks.
Even if we emailed the Chinese military exact instructions on how to do this they couldn't, the metalurgy required is beyond them, they can't even fabricate regular military jet engine compressor blades
@@tbyte007 the j20 engines lifespans are measured in 10s of hours, all of their current flying j10s use Russian import engines entirely, it's also worth noting those Russian designs arnt very good, they are _very_ old, about the same as the f14a engines, they are powerful but guzzle fuel because the profiling of the engine was done on tape and reel computers from the 70s when fluid dynamics was a pipe dream.
That's my understanding that most heat engines are using deflagration. Scott Manley as a video that might provide more understanding ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-rG_Eh0J_4_s.html as I do not have a physics background.
Well, internal combustion engines,.. the flame front moves kinda slow and way below the sound barrier roughly 10m/s in the process called deflagration, on the other hand in this type of engine (RDE) the flame front/shockwave travels a heck of a lot faster roughly 2000m/s, so RDE engines are the Internal Explosion engine, hopefully this somewhat clarifies it (I’m definitely no expert so it could be all wrong)
It usually means copper is burning, so your engine walls, sometimes when an engine starts theres a green flash and thats t-tab fluid to start the flame
How many Chinese are transiting outside Edwards these days? They need a new thing to copy..Oh wait, they're already in your databases.. Never mind. Great stuff though. Love engineering.
Remember when it was cool to be in the Military? When Disney's Tomorrowland was filled with things from NASA? It was like a wonder for all ages the advancements that have and will be achieved in the future. I still remember the songs played. And now we get Memo's on how to use gender neutral language for the Chair force. Truth is? I wonder if Lockheed already went past most of this Chemical propulsion and skipped right over to something else since its military use is now somewhat diminished. That? Or there is no real drive to create or innovate since the entire reason for Mankind doing so has been usurped from the joy of creating a better tomorrow? what a strange turn things can make in 40 years
if it wasn't for derpy, you wouldn't have multibillion dollar stealth fighter jets. in fact there would be no air force, and the US army would be fighting with sticks and stones. so show some respect for the pasty nerds. they've basically made USA one of the most powerful nations on the planet.
@@Dejawolfs you are attributing a great many achievements and advancements to one guy. But my country has all those expensive toys, because after WW2 we were the only country really left standing and in exchange for our protection the nations of Europe that were destroyed in that conflict had to pay us a percentage of their gdp, and then once they all went delinquent on that debt my nation decided that all nations would purchase petroleum with US dollars and while that license to print currency is coming to a close, it looks like Europe forgot the lessons of the past and poking the bear that is Russia who when compared to the Chinese communist party actually looks like a teddy bear, still they have just a shit load of nukes and the leaders of the European Union and the UN need to tread lightly with those assholes, lest they need our billion dollar weapons to save their collective asses again. My country does some shady fucked up shit and that’s down to a class of career politicians that need to be removed from office, but keep in mind if the shit hits the fan you’ll be super happy to see a few F35’s or stealth bombers. But you go ahead with your righteousness indignation
