How NASA Reinvented the Rocket Engine
Ғылым және технология
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Credits:
Writer/Narrator: Brian McManus
Writer: Josi Gold
Editor: Dylan Hennessy
Animator: Mike Ridolfi
Animator: Eli Prenten
Sound: Graham Haerther
Thumbnail: Simon Buckmaster
References:
[1] “Increasing engine efficiency,” Aerospace America, Apr. 30, 2018. . aerospaceamerica.aiaa.org/dep...
[2] “Falcon 9 - SpaceFlight Insider.” . www.spaceflightinsider.com/ha...
[3] “Current State of NASA Continuously Rotating Detonation Cycle Engine Development,” in AIAA SCITECH 2023 Forum, American Institute of Aeronautics and Astronautics. arc.aiaa.org/doi/abs/10.2514/...
[4] “Computational Study of Deflagration to Detonation Transition in Pulse Detonation Engine Using Shchelkin Spiral,” Appl. Mech. Mater. www.scientific.net/AMM.772.136
[5] “A Theoretical Review of Rotating Detonation Engines | IntechOpen.” . www.intechopen.com/chapters/7...
[6] “Rotating detonation combustors and their similarities to rocket instabilities,” Prog. Energy Combust. Sci. www.sciencedirect.com/science...
[7] “Gaillard et al. - 2017 - Numerical simulation of a Rotating Detonation with.pdf.” . hal.science/hal-01558902/docu...
[8] “Teasley et al. - 2021 - A Review Towards the Design Optimization of High P.pdf.” . ntrs.nasa.gov/api/citations/2...
[9] “Pressure Distribution and Performance Impacts of Aerospike Nozzles on Rotating Detonation Engines,” in 2018 AIAA Aerospace Sciences Meeting, Kissimmee, Florida, Jan. 2018, doi: 10.2514/6.2018-1626. arc.aiaa.org/doi/10.2514/6.20...
[10] “Effect of Aerospike Plug Nozzle Design on Rotating Detonation Engine Performance for Rocket Applications | AIAA SciTech Forum.” . arc.aiaa.org/doi/abs/10.2514/...
[11] “観測ロケットS-520-31号機による深宇宙探査用デトネーションエンジン宇宙実証実験に成功,” 宇宙科学研究所. . www.isas.jaxa.jp/topics/00269...
[12] “NASA RDRE For Release to AIAA Teasley ER13.pdf.” . ntrs.nasa.gov/api/citations/2...
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Thank you to AP Archive for access to their archival footage.
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@pyeitme508
Жыл бұрын
RAD!
@CyFr
Жыл бұрын
That fluid flow "valve" was developed by Nicola Tesla, literally named the Tesla Valve.
@flipnshifty
Жыл бұрын
MERGINAL GAIN
@BS-vm5bt
Жыл бұрын
Interesting video though I prefer the NSRW or a FFR engines. They work way better if you want low relativistic speeds while chemical engines are extremely unpractical in comparison. If we want to expand in the solar system fission is the only way to go since fusion does not currently exist. The NSRW has a speed limit of 7.62% of C with 300 ton spacecraft with weapons grade uranium source. Even with efficency loss that a nuclear engine has its still way better then chemical rockets thx to its energy density. Nothing can compete with fission.
@sahinyasar9119
Жыл бұрын
@@CyFr I was thinking same thing
The best April Fool's day video is a completely normal video that makes the viewer question everything the entire time.
@ExEBoss
Жыл бұрын
Especially with a clickbaity title like that.
@jasonmajere2165
Жыл бұрын
This is very real.
@Eduardo_Espinoza
Жыл бұрын
Did it out 3 weeks before on nebula?
@franklinblunt69
Жыл бұрын
Especially when reliant upon Russian technology...😁
@YourLocalDemocracy.Officer
Жыл бұрын
ultimate gaslight
I’m a minute in to this video and can’t tell if it was intentionally published on April 1 or not…
@austinlhampton
Жыл бұрын
No very real thing, theres a couple vids out there of people making them on their own, they are super cool, watched an interview where one of the dudes mentioned that the shock waves blew off a 500lbs door to test chamber XD shits wild, ong though the air you have to force through to get the effect to make it work is insane, issue is the damn thing not melting itself
@dennispremoli7950
Жыл бұрын
This exists.
@InstructorRandy
Жыл бұрын
Nah it's legit man
@laurencehoffelder1579
Жыл бұрын
@@austinlhampton i mean the "500lbs door engine" is not a DIY engine but the test engine from the TU Berlin. NEVER try to build a RD-engine DIY or operate it without a sufficient test stand. It ist just to unstable and difficult to get right for the amateur.
@Tuned_Rockets
Жыл бұрын
it was published on nebula 2 weeks ago so april 1st is probably a coincidence
"Sir we've got a problem with explosions happening in the combustion chamber." "Have you tried setting off explosions in the combustion chamber?"
@twistedyogert
Ай бұрын
"I used explosions to destroy the explosions."
@CinemaDemocratica
Ай бұрын
@@twistedyogert I didn't remember writing my comment so this was a lot of fun for me. :-)
Excellent video; I actually did my Master's research and published a paper on GRCop-42 in partnership with NASA. It's a fascinating material and has a ton of promise. We looked at 3D printing it using high-pressure cold spray deposition, bonding it with another super alloy called HR-1, and doing many experiments with various ways to heat treat them. I'd be happy to answer any questions, and link my article or video of the my presentation. Either way, this video made my day and certainly brought a smile to my face. Thanks for the great work!
@davedsilva
6 ай бұрын
Please link your article and video.
@yyattt
4 ай бұрын
I'd be interested to see your presentation. I guess you wouldn't be able to post a link, but perhaps you could make it available on your channel?
Saw the M1 abram tank video. Your animation have come a long way from blue graph paper design to now realistic 3D renders. I really loved it
@fateh5914
Жыл бұрын
That’s a different channel. Real Engineering hasn’t ever made a M1 Abrams video. But his graphics have definitely improved.
@RahulAhire
Жыл бұрын
@@fateh5914 it's on nebula
@casualbird7671
Жыл бұрын
@@fateh5914 ..did you not watch the end of this video?
@fateh5914
Жыл бұрын
@@casualbird7671 sorry about that, I’m wrong on this point. There is an M1 Abrams video on Nebula. I should’ve checked before posting my comment. My apologies.
@emmanotsostrong
Жыл бұрын
@@fateh5914 why do your comments sound like they were written by ChatGPT? 🤔
Its didnt look like the area under the curve was that much different, but then I realised the x axis was logrithmic.
@fedomandez
Жыл бұрын
I was thinking the same
@cthulhufhtagn7520
Жыл бұрын
Y axis but yeah
@MelindaGreen
Жыл бұрын
I didn't notice that and was puzzled too, thanks. #NotAllAreas
@suicideistheanswer369
Жыл бұрын
Thanks, I was confused.
@nam3go3sh3r3
Жыл бұрын
what do you want a cookie?
This video was really cool to watch! I work in a lab with one of the guys who designed the NASA RDE, and one of my other coworkers is cited here, it's awesome to see detonation combustors getting some more attention on KZread!
@patelp9701
Жыл бұрын
I also work with one of those guys!
@Eduardo_Espinoza
Жыл бұрын
Don't lie, it was all chat GPT
@tonyrusi1978
10 ай бұрын
Name the engineers! They deserve the credit!
@robert.kawasaki
6 ай бұрын
KZread is the best!
@arrotp4665
2 ай бұрын
@@tonyrusi1978opsec violation
*We researched this in 1982 when working at Aerojet/Rocketdyne and they are very LOUD engines (((())). We also dropped lead pellets into the flow and come up with a hybrid machine-gun that shot 25,000 rounds of .30 Cal. per second at 3100 feet per second. The US Navy still thinks this type of "Detonation Gun" could take down hyper-sonic war heads by creating a near solid wall of high speed flying lead or ceramic pellets.*
@arielhermoso4262
Ай бұрын
@johnslugger : Why no "prototype" gun was built, out of such finding with RDE technology... It must be called "gasoline gun", "benzene gun", "propane gun", etc.!!...😊😊😊
When you started describing the needs for the injectors, I new you were gonna mention Tesla Valves! Very cool that they have some palpable practical use case.
@petersilva037
Жыл бұрын
disappointed he didn't call them Tesla valves.
@hydrolifetech7911
Жыл бұрын
@@petersilva037 same here!
@arnaudt3935
Жыл бұрын
@@petersilva037 Yep
@vorpalinferno9711
Жыл бұрын
@@petersilva037 You cant call any tech related product 'Tesla' these days thanks to Elon. Its not that he is going to attempt copyright trolling, its the confusion the naming is going to create amongst casual audience. Nvidia had their server based GPUs called Tesla long ago before any car was named that. Jensen just withdrew the branding name to remove any confusion.
@TheRmbomo
Жыл бұрын
@@vorpalinferno9711 You could just call them Nikola Tesla valves then. Rolls off the tongue only marginally worse, and no confusion.
I need to make a small correction: at 8:05 the compressor is actually the segment 2-3, as it increases pressure while reducing volume. Point 1-2 is actually a fictitious transformation used for calculation purposes from what I remember, as it's not really a cycle sincr the exhaust is not really cooled down and then reused.
@zecc81
Жыл бұрын
I had to replay that 3 times to really make sure I was hearing "a compressor decreases the volume at constant pressure" and concluded that no, that is not how that works.
@verylongname8161
Жыл бұрын
@@zecc81 same here, of course its a compressor why would it not increase the pressure also purely for land based electricity generation, combined cycle plants can be well over 80% efficient so its not really useful to my disappointment
@ichbrauchmehrkaffee5785
Жыл бұрын
I was specifically looking in the comments to see if someone else stumbled upon this. Just recently wrote an exam in thermodynamics, where we did cover cyclic processes. I don't see how an isobaric reduction in volume would make sense, that would mean, that temperature had to go down..
@katzen3314
Жыл бұрын
Thankyou! I knew something wasn't right there
@Wemdiculous
Жыл бұрын
Why is the volume of the detonated fuel so much lower than the volume of the deflagrated fuels? Is it because these areas are the same, but they’re using less fuel?
How exciting! I was fortunate enough to work on a detonation research project for my master's thesis at university. It took us something like 7 different tests over a month long test campaign to finally get a detonation, very finnicky stuff!
11:01 This is a Tesla valve, it's been around for over a century. Fascinating it's seeing use again in such cutting edge technology.
It's actually crazy that I watched the full version of SmarterEveryDay with the Saturn V walkaround and they spent a lot of time discussing the engine baffels and problems before hand. Stuff like this proves there is another way to do things. re-inventing the wheel is sometimes the way to go!
@HuntingTarg
Жыл бұрын
One could say 're-engineering.' Ancient chariot wheels were redesigned for agricultural carts of the Roman and medevial periods; which were redesigned for travel wagons in the American West, which were redesigned for automobiles in the 20th century. This is simply a re-engineered rocket engine designed to use detonations in a controlled way, rather than prevent detonations.
@MonkeyJedi99
Жыл бұрын
I think "rotating detonation engine" is one of the coolest names for a rocket ever.
@peadarr
Жыл бұрын
Did you watch the first half of the video where he spends most of the time explaining why it wasn't possible to build one until today?
@k6l2t
Жыл бұрын
The less bias you have, the more you will realize that the metaphorical wheel needs to be "re-invented" a lot more than you might think.
@Eduardo_Espinoza
Жыл бұрын
@pascal jacob It was because of the 3d printing of the Tesla values right?
Another 3D printed, Oxide-dispersed (ODS) sintered composite alloy named GRX-810 is also developed for NASA. Very cool stuff, material engineering.
@mpetersen6
Жыл бұрын
I think that advanced alloys or composites combined with 3D printing and proper designs concentrating on maximunstrength vs minimum weight might finally allow for a practical SSTO. Not one that carries cargo. But one that can function as a taxi carrying crew to orbit.
@Jaker788
Жыл бұрын
@@mpetersen6 I'm afraid the physics of SSTOS just don't ever make sense on Earth. 2 stage rockets can still be rapidly operated like a taxi and are significantly more effective and reasonable in size/weight vs carrying volume and capacity, the technology of rapid reusability and reliability just needs to be worked on as that is the biggest factor to being an effective taxi.
@How23497
Жыл бұрын
@@mpetersen6 SSTOs from earth are just flat out inferior. Maybe from a different place, but they are just less efficient.
@mpetersen6
Жыл бұрын
@@How23497 Lets say with breakthroughs in materials science and improvements in engine performance it was possible to build an manned SSTO capable of carrying say 6 passengers to orbit. Even if it is not as efficient as an optimized two stage vehicle. With a short turn around time. There is more than one type of efficiency. There is the mass ratio efficiency. And then there is the man hours turnaround efficiency. One thing in terms of materials science that might improve the possibility of an SSTO could be the use of Byrilium alloys in place of some of the materials in use today. And yes I'm aware of the potential issues with Byrilium. Besides say we have a barely workable SSTO capable of functioning as an orbital taxi. Just how well, would the same vehicle work from the Lunar or Martian surface. As an aside perhaps an SSTO (1) could function with dropable liquid fueled booster of extremely simple design. 1) It should be remembered that the first US built launch vehicle to place a man into orbit was almost an SSTO.
@moritzaufenanger2537
Жыл бұрын
Coming from the bike industrie this comment made me look twice :)
They have progressed so much, omg! I’m hyped to possibly see a RDE being used for space missions during my lifetime. Thanks for the video ❤
Thank you very much for explaining how this integrates the aerospike nozzle. I saw it in the test units, and wondered if this was actually the next phase in the aerospike research they were doing a couple decades ago, or whether this was something totally different. I can now see it’s kind of both - you could do an aerospike engine without rotating detonation, but as you point out they are natural partners.
Did anyone else notice that that design of the special inlet/injector valves (referred to as fluid diodes), shown at 10:54, is a version of Nikola Tesla's "fixed-geometry passive check valve designed to allow a fluid to flow preferentially in one direction, without moving parts", patented in 1920, U.S. Patent 1,329,559. I believe this was confirmed by UPI Science News article, May 17, 2021
@benoit-pierredemaine3824
Жыл бұрын
yup. many other comments talk about it.
@TheDJOblivion
6 ай бұрын
Tesla was such a technological genius. His understanding of electrical/magnetic mechanics and fluid dynamics is unmatched. We desperately need a new newton/tesla/Einstein guy.
@user-tm9qs7jo9j
Ай бұрын
Every single person went straight to Tesla valves immediately
Those nozzle explanations were amazing. Simple and very effective, well done! Thank you!
This was incredibly well presented and explained. I learned a lot. Thanks for the great video!
Tesla valve - it's amazing what 3d printing has done so far and the possibilities we can't even imagine today.
@stints
Жыл бұрын
That man truly revolutionized everything.
@catalintimofti1117
Жыл бұрын
@@stints he really advanced mankind And as a reward he was hated and shunned We didnt deserve this man
@AllisterCaine
Жыл бұрын
Yup... It's absolutely mind blowing times we live in. Can't be long until cancer will be a thing of the past and and we have will be bothered by the problems coming from humans living forever...
@damonedrington3453
Жыл бұрын
Once we learn to 3D print some more varied materials I expect the technology to explode a la computers in the 90s and early-mid 2000s
@mattshu
Ай бұрын
why wasn't he mentioned once during that part?
Gotta love the almighty RDE
@davidaugustofc2574
Жыл бұрын
The tomato king is here
@fiercemonkey1
Жыл бұрын
Homie, you so need to build one! But, please do it safely, and keep trying if you don’t succeed. 😊 also, love ur vids, and maybe run it at a much slower rotational velocity and maybe use some “em” fields to stabilize the flowing plasma? Think about it, you can fry a lot of tomatoes 🍅 with that kind of boom 💥
Very interesting video. A complex topic is explained clearly without an overuse of jargon. The great visuals help with comprehension.
I’ve always been obsessed with Aerospike Rocket Engines and was disappointed that they never made it past testing phases. There is hope still yet!
This is a lot further than I thought this design would get. I am stunned.
Interesting choice. Putting out a video on such a REVOLUTIONARY technology on April 1st...
Wasn't sure what this video was going to be about but was throughly surprised to see the pde long-ez. Its a very interesting concept. Would be intwresting to see them use another long-ez to test an RDE engine one day.
Fascinating and informative. Congratulations subscribed.
I love the animations and the sound effects. a lot of research was very well presented! thank you for this great video
A new aerospace video! Thank you Real Engineering!
YEEEEEES!!! I’ve been wanting an in depth look at RDEs ever since I first heard of them years ago.
RDE is an amazing engine and aerospike with it, is a nice bonus. Also your animations are great.
It's great that pressure-volume diagrams are used to compare efficiencies. However I think that the horizontal line from 1->2 in the diagram of the gas turbine is not about the compressor? The compression process is an adiabatic process that increases the pressure and temperature, which should be 2->3. The flat line is where the open-loop gas turbine engine gets cool, fresh gas from the atmosphere, so the pressure is the same, but the volume is much lower because the gas coming in is cooler than the engine's exhaust.
@AeroconX
Жыл бұрын
I agree
Finally! A real use for the Tesla Valve.
@sakiskarakasidis
Жыл бұрын
👍
I'm not sure if I said this bey, but I was making and thinking about this type of engine for my sci-fi settings and I'm glad that I wasn't the only one who have since it is really cool and just a system we need! Other than that it is an Aerospike Bell Cone Thruster combo with the spike being just exposed enough for the flames to reach. Though there are some issues I see when it comes to Space use and that is the fact that we don't have an atmosphere to keep the pressure intact. One solution I thought about was to make the cone retractable to get a traditional bell thruster but still keep the normal pulse feature so it can still be on trajectory. Other than that, fusion or ion systems can help with that once there.
This is so cool. At supersonic airflows, beurnellis principle reverses in the sense that a divergent duct exhaust will increase the velocity of the charge. F=M(A) says that the faster the fire shoots out of the flame end, the more the pointy end goes up
Absolutely gorgeous visuals, just WOW
Good videos man. I love how you explain everything, I learn a lot.
Your information is just rounding the numbers. Everything is good from what I’ve seen. Good video.
Really have to appreciate the precision modern engineering allows. Crazy to think this stuff was only conceiveable even just a decade ago. This stuff won't just affect rocketry. Give it time & it will improve just about every other vehicle you could think of.
First explanation of RDE that I actually understand. Awesome!
Had subtitling on by accident, and noticed what looked like a citation reference (never noticed that before). The joy of then actually finding those references in the video description is indescribable! Yay for references!
Best animation with great detail in engineering
Good to know that 3d metal printing is coming more viable and more cheaper.
Interesting! Heard about this some years ago, but back then it was considered not viable because of instability. Guess they're slowly getting better.
@slinkeyj3
Жыл бұрын
That's the game of science, research, and engineering lol. Always trying to push the boundaries of what's possible. You find a breakthrough that allows a new concept to work, but then you need to research and develop it to allow for said concept to be able to function more efficiently and/or longer. Rinse and repeat when you think you've hit the limit of current technology lol
I didn't know someone pulled off a full scale test of one of these! Amazing!
Thx for the video!
this looks like a really interesting video, I hope its not april fools
Very creative! I hope they get it all worked out! Thanks for the video!
You Sir, are amazing! Great channel, great info, great presentations, always!
damn that unidirectional valve is amazing. Thanks Nikola
The Rocket/Turbine Cycle - Brayton Cycle described at 8:01 got it wrong. 2-3-4-1 is the order he described in the video. 2->3 compression 3->4 burning fuel 4->1 expansion 1->2 exhaust kzread.info/dash/bejne/qYB5qLmiYce9nbw.html Got a good explanation
@badapple2221
Жыл бұрын
Thank you very much
@wagnerrp
Жыл бұрын
You're not suggesting that the purpose of a compressor is to increase pressure, are you?
@derMor97
Жыл бұрын
@@wagnerrp That is the purpose of a compressor
Love your videos bryan, keep it up!
Dude, your channel is awesome.
Pretty awesome tech. I love to see those "small" steps towards a different future for human civilization.
Fingerprints on the laptop screen in the animation made me realise that you've gone so far in 3d renderings. I appreciate it man!
It awesome seeing new improvements in tech being developed. It's easy to think that everything's been discovered and explored, yet our best photos of Pluto came from New Horizons in 2015. I always assumed we had high quality photos from years prior, but no, we're still learning.
Very nice explanation!
As always impecable video
The last time I was this early, we were still sending manned missions to the Moon
Very interesting, also explained Aerospikes perfectly
Would love a dedicated aerospike video 😍 this one was fantastic!
This boutta be good
An exceptional video... made my day!
Excellent video, would like to hear more about potential applications of the Oblique Wave Detonation Engine (OWDE) which is a more efficient variant of this.
the fluid diode injectors are such a simple, elegant solution to the backflow problem
The 3D rendering in your recent videos has been on another level! Is Mustard doing the modeling?
So I'm a big Tesla turbine enthusiast and, having come to accept its limitations, got into trying to understand the hypothetical areas where it would at least be uniquely advantaged. One of those was its ability to eat pressure waves without issue and the fact that assembled alternative patents outright paired his fluid diode (the "Tesla valve" or valvular conduit) with the combustion chamber. Been playing with that idea in my head of a rotating detonation rocket engine utilizing the valvular conduit for years (something Integza's talked about) and to see 11:00 made me throw my arms up in celebration. Us Tesla valve detonation lovers were right!
@prasiddharajgurung
Жыл бұрын
That man was too ahead of his time
10:50 isn't that an adaption of the Tesla valve? Also 12:40 that explains why the falcon rockets exhaust plumes seem to expand so much as they get higher. Fascinating video as always, thanks!
High quality content, thank you!
Love the engineering of these videos, it’s amazing what can be designed and the innovation to overcome problems.
@TippyHippy
Жыл бұрын
I put my hamster in a sock and slammed it against the furniture.
@sharkbitesback2749
Жыл бұрын
@@TippyHippyjust because of you im liking this comment
What a coincidence that you published this video as I'm studying compressible supersonic flow for my aerospace class 💀
@ok0_0
Жыл бұрын
Another excellent ep, thank u RE and Nebula!👍👍
This was so fascinating I will be watching this episode again. Having ADD doesn’t help but that’s besides the point.
Great job by the graphics team - really helped in explaining things. What I love is the thinking: "So, we don't have any material that can support use making a rocket whose exhaust is supersonic all the time?" "Right, but we do have material that can support supersonic exhaust SOME of the time." "I know! Let's rotate it!"
@brynclarke1746
Жыл бұрын
To be pedantic, all rocket *exhaust* is supersonic, it's having a supersonic flame front in the combustion chamber (and thus having combustion at a higher pressure than the fuel/oxidiser is delivered at) which is new
Everyday Astronaut did a good video on the setbacks of Aerospike engines, chief among them is the massive amounts of heat the spike needs to endure with few ways of cooling, which often results in self destruction.
@Br3ttM
Жыл бұрын
Some of the advancements that allowed this engine were an alloy good at resisting and conducting heat, while being 3d printed to put in cooling channels that couldn't be machined.
@slinkeyj3
Жыл бұрын
Yuuup. And that probably has a LARGE team of researchers and engineers by itself just trying to improve upon it's longevity lol. It's crazy how many people will be dedicated to improving and developing just one singular component
Love the intro! Such a quality channel.
This video is crazy good!
Real way to learn engineering. Thankyou 🙏🙏🙏🙏
@damianw.415
Жыл бұрын
Nah. Mathematics are the real way.
@anmolgupta-bj5ce
Жыл бұрын
Mathematics is a tool used to answer questions for physics 🙏
I learn more from your videos than I do from science class
@brentwilbur
Жыл бұрын
Except when he spews climate change nonsense.
@scottnj2503
Жыл бұрын
This is IMHO, the unintended but not surprising result of "No Child Left Behind" and underfunding of the public education system on whole. If you are a HS or College student. Good on ya for seeking more knowledge.
@gilbertlopez
Жыл бұрын
climate change is real, humanity is worsening the effects
@andrzejostrowski5579
Жыл бұрын
No, you don’t.
@mrcat5508
Жыл бұрын
@@andrzejostrowski5579what
When I watch videos like this, it makes me believe in humanity and our future. We have many huge problems: climate change, pollution, wars, energy deficit, extinctions of species, and so on. But we can overcome everything! Thanks for the inspiration:)
Very very interesting! Thanks for your work About the PV chart I'm not sure the the compressor "decreases the volume at constant pressure" (it's the heat exchanger in a power plant or new fresh air intake in an aircraft turbine), the compressor is more likely the step 2 to 3 is your diagram. The intake is point 2 :)
@franzperdido
Жыл бұрын
yeah, this part also made me think. I think you're right and it's not correctly explained in the video.
6:00 I remember Scott Manley covering this in a video on the development of the F-1 engine. I love how NASA made a literal bomb-proof engine. 8:50 Interesting that the increases in thermodynamic efficiency for Hydrogen and Methane are almost the same. Also, the fact that the exhaust travels at multi-Mach speeds should make for an excellent booster engine. Perhaps SpaceX will purchase something from NASA for once.
@mobiuscoreindustries
4 ай бұрын
That is correct but there is also likely going to be severe scaling issues just like flow instability isn't an issue for small chambers but became lethal for the F-1. The larger the chamber, the more the fluctuations will increase, both with higher highs and lower lows. This may make scaling the engine more difficult. Also, I can see how flow rate for such an engine could be limited. Due to needing to constrain the combustion more, you will obviously end up with less mass flowing through your system. Which isn't a problem for orbital stages, because there only efficiency matters. But during ascent to orbit, thrust matters just as much, and usually far more. Not only do you actually need a set amount of thrust to just get off the ground, but you gain far more payload to orbit by spending less time losing energy to gravity, even if the engine ends up being less efficient. We saw this with raptor engine development, and how via changes to their thrust and the vehicle's flight enveloppe, increasing thrust and spending less time fighting gravity, they basically doubled the initial payload despite some losses on the ISP of the vacuum engine. A far better trade than a 5% efficiency increase. I see this absolutely sweeping high energy upper stages tho. Stuff that still need to fight gravity for a bit but also needs to fling things far away.
Absolutely wild! That injection inlet design and manufacturing alone has surpassed engineering and became magic. This is beyond insane. The wild stuff humanity can do nowadays keeps blowing my mind... Oh and NASA still got it!
@leadboots72
Жыл бұрын
It's a tesla valve.
@Youbetternowatchthis
Жыл бұрын
@@leadboots72 holy **** it's true. This man really was ahead of his time!
@leadboots72
Жыл бұрын
@@Youbetternowatchthis Yes he was.
The synergistic effects of these design approaches are fascinating and ingenius. What is notmally a disadvantage of both aerospikes and detonation engines is the requirement for a large annular combustion chamber, thus when combined they effectively offset half that the disadvantage. Another propulsion system that can benefit from this synergy is the expansion cycle turbopump. Expansion cycle engines require a large combustion chamber surface area and thus are normally limited in size due to the square cube law. But the larger area and high heat load of an annular detonation engine is ideally suited to this particular pumping cycle which offers ideal propulsive efficiency. You can also opperate the engine much closer to stoicheometric. This is why I believe an expansion cycle rotating detonation engine with an aerospike nozzle is the holy grail of chemical rocket engines.
Great video love the rant, do more like this
These videos inspire me as an aerospace engineer to imagine how the future of engineering is going to be like and this one was just as great as all the rest, Thank You! I really hope the development of these engines continues, they look so futuristic and will hopefully make space travel more efficient 😄🔥🔥
The topics you cover and the way you cover them is awesome and the render sequences are just sick, I sometimes forget that they are rendered
Great work!
I'm really happy that an aerospike style engine is getting some attention outside of greenscam startups.
I saw this on new atlas, and it was nuts when I saw the vid of its testing
You mentioned comparing a d-engine to a gas turbine engine. I wonder if an air-breathing detonation engine. A 5% increase of efficiency would greatly benefit air travel too!
@litkeys3497
Жыл бұрын
DARPA is trying to build an air-breathing RDE to put on missiles & aircraft. My understanding is you could potentially get 25% longer range on the same fuel, which would be HUGE. Only caveat is that the use case is probably limited to supersonic aircraft which means we probably won't see them replacing high bypass turbofans on airliners soon
@EveryoneWhoUsesThisTV
Жыл бұрын
Pulse and rotating detonation engines are crazy loud, but can be used in high-altitude air travel... :) Effic increase should be more around 25% Pulse detonation engines are already around 25% more efficient, so rotating should be too, or they won't bother with them... NASA have a pulse detonation engine powered aircraft...
@yesyes-om1po
Жыл бұрын
airlines have tight margins, I think this could only be used for extremely expensive private jets meant for the likes of Bezos. A 5% increase isn't much at a Jet's level. It is a modest figure in that regard, not game changing but still welcome.
The injector flow channel geometry looks quite similar to the Tesla patent for a one way fluid flow valvular conduit. It is also fascinating that the output nozzle of the engine looks to be like an aerospike design.
@sirati9770
Жыл бұрын
Turn out you wrote this comment before finishing the video
The Tesla Valve but arranged differently basically? Cool stuff
found out about them in 2016 and been waiting ever since to see them advance. can't imagine how bad it is for the guys who envisioned them decades ago and never got to see them being produced
@benoit-pierredemaine3824
Жыл бұрын
some research take over 50 y ... hope you were very young in 2016.
Unbelievable quality of visualisations + content! TV is dead. Long live YT creators!
@godspeed133
Жыл бұрын
as good as any beeb doc for sure, and they don't have some exec telling them what is and isn't allowed in (regardless of political affiliation)
Thanks for helping me learn some actual rocket science!
Great video Thank you
For anyone that wants to know how an aerospike engine works, Everyday Astronaut has a great video about them that you can watch right now. He's got a ton of other rocket engine explainers that would not feel out of place on this channel and they're all well with checking out.
13:30 Please make a video on AEROSPIKE ENGINE, it will amazing...
@CarlosAM1
Жыл бұрын
watch everyday astronaut's video on it
@gopallohar5534
Жыл бұрын
@@CarlosAM1 I've watched that (big fan) but I am still confused 🤔 so...