An RDE is theoretically more efficient than conventional deflagrative combustion by as much as 25%. The concept has been known for some time but is finally making progress due to new materials/modeling.
Sources & Credits:
ICE
• Image of a hydrogen en...
• Achates Power Opposed-...
• Bourke 10 CID engine e...
Pulse Detonation
• ACEL Pulse Detonation ...
• Penn State Altoona Pul...
• Valveless Pulse Detona...
RDE
• Rotating detonation en...
• Longitudinal pulsation...
• Progress in RDC/Fortsc...
www.nasa.gov/centers/marshall...
It would be good for you to take us one level further/deeper. a) materials b)fluid dynamics c)logic/computer control d) instability sources of continuous D .........
This one’s great if you want a detailed understanding kzhead.info/sun/hbqxl92ylpOshIU/bejne.html
Have you found anything that goes into this? Imagine it wouldn't be a video it's probably some articles on one of the stack exchanges
You'd have to take a look at rotating detonation engines, I'm sure there's some articles on them because we've been trying to build them for a while. The news is that Nasa got one 3d printed version running for several minutes, so everyone is excited because we're much closer to solving the issues
Real engineering has a video on it. Edit: it’s the latest video as of the posting of this comment
You didn’t say please…
Also interesting to see that Aerospike-type nozzle is being tested alongside! As an Engineer who loves CFD and Aerospike, I would love to see what the future holds!
Not really alongside. From what I have heard the aerospike is integral to the RDE design to the point that it would not perform even as well as a more standard combustion design with a bell nozzle. It seems like the aerospike and the rotating part work really well together.
@@antigravity7418 And for the low low price of $10,000 we can all buy shares in your company. Pass. Make a flying car, a REAL flying car, and you'll be a billionaire. So far nobody has.
@@antigravity7418 Good luck !
It should work with the right weight to power ratio in order to achieve the best efficiency point with multiple detonations even if it means more light weight rockets
meanwhile in area 51: 🛸
RDE looks like it oculd be the next step in Aerospace engines. Computational fluid dynamics, as my favorite Physics prof at the U of A used to say, don't forget to carry the one.
Yes, somewhat. There are other steps going ahead as well. NASA has a working RDE engine and as mentioned these are 20% to 30% more fuel efficient than current engines ng ones which means you can many more tonnes of mass into orbit for the same fuel. But you're still limited when it comes to distance you can travel. And for the distance problem NASA is working on a nuclear engine and hopes you do a rocket test with its nuclear engine in 2027
Great video! I just learned about this for the first time, but this short video really covers all the bases regarding limitations of the pulse detonation approach (shock wave noise and vibration), along with the possibility space for future developments (AI-developed materials for continuous pulse detonation commercialization; rotary detonation, essentially a continuous series of timed detonations). Mach 5 is a nice dream but the materials to support that using pulsed detonation still need to be invented!
If they really get an RDE working, ready for production, it's going to change more than just orbital economics. It will change aviation as a whole. Definitely one to watch.
I’m a little late to see this… but I have some experience working on/with linear aerospike engines. I worked on the Lockheed Martin X-33 (the prototype technology tester for the LM VentureStar), and I spent a lot of time with the good people at Rocketdyne, who were developing the XRS-2200 Linear Aerospike engine. I have always wanted to see this concept in use, and I attended most of the XRS-2200 tests that were performed at Stennis in Mississippi. These engines were very, very promising. To me this was the most important technology to be tested on the X 33 as everyone knows the X 33 was canceled in March 2001, but we did at least get working linear aerospike engines and we had some data on those. The difference that I can see between the engines you’re talking about (with a pulse detonation in a circular motion around the periphery of the ramp) and a circular aerospike engine will be that a circular aerospike engine would have all the thrusters operating simultaneously, and continuously, rather than pulses - moving around the periphery in a circular, tornadic fashion. I like this idea, except I would be more comfortable if the thrust were more symmetric about the center of the circular ramp. In other words, why couldn’t we have two detonating simultaneously across the center of the circular ramp from each other? I’m always a little uncomfortable about any kind of nonaxisymmetric thrust on a rocket engine, even if the pulses moved very quickly - there would still be some thrust vectoring (TVC) that might be an issue. I think this is something we would want to avoid. The concept of aerospike engines with the external ramps is a very old one and it’s back to the 1950s. There was an instance of somebody (and I can’t member who) that put a circular aerospike engine on a barge… and they were able to get some good data from that test. Great video, thanks for posting this! Cheers from New Orleans. 🥃
Thanks for taking the time to make this video! It makes a very complex subject more understandable! Well done, Cheers 👍
nEw AeRoSpAcE eNgInE dEsTrOyS rOcKeTs
Watermelon
@@_TF2EnjoyerEarthmelon
Water Spaniels!
The KZhead creator Integza made a really fascinating video with some scientists who're researching the rotary detonation. The video demonstrates the force and heat produced from relatively small RDE. Pretty cool video that I would suggest to anyone interested.
There definitely were a lot of likes and requests to do follow up advancements.
I like the format of your video - no lengthy intro, dense technical info unlike dumbed down pop science channels. Love it!
Great Videos, we appreciate you taking your time to produce them !!
Exactly
i am happy youtube suggested this video to me, i never heard about an RDE or detonation supersonic wave. makes me want to know more about these topics :)
Fascinating. I've been following this concept for some time. I am curious whether you can express the output in terms of Isp ( Specific Impulse ).
Cool, I always wondered about these. Looking forward to more now.
Rotation detonation ,never heard of it,amazing and the alloy,thanks
So much great info in such a concise presentation! 🙂
It’s ironic that the one main flaw in the internal combustion engine, the air flow around the edge of the bore to piston, is the bases of this technology. Love it and love your content a lot.
Great video! Was expecting something different from the title but pleasantly surprised the space war hasn't started... yet
I always wondered why this promising propulsion system is not heavily used in aviation and rocket engineering. Thank you for explaining, great video!
reliability isn't there yet. also runs very hot.
how about you sign up to fly one? And if you don't then question answered
Another fascinating video. Thanks for making it. I’m very curious what AI engineering systems may come up with for this class of engine.
Very interesting rotational explosions that create some awesome thrust. I was thinking about linear explosions to create a constant thrust.
Awesome video bro, keep up the good work, kudos.
Appreciate it!
Thanks for a very rare video; NEW facts presented without hype.
Perfect demonstration video. Controlled detonation is an ultimate logical future of chemical reaction thrust!
Well explained video, about a very interesting subject! Thanks for posting!
I think this needs a lot experimentation with many different designs, which might then result into some hobby designer finding a weird solution that is designed in a way that it fixed most problems with keeping the detonation rolling.
Knowing our track record. It'll be an rc hobbyist or someone trying to strap one to their car or motorcycle
If you understand the materials and or computer sim needed, plus the 3d metal printers, it doens't look possible.
@@635574 until someone comes around that doesn't know it's impossible and builds something ridiculous that fixes the problem with keeping a constant detonation. Well, one might dream.
@@635574you don’t need 3D metal printers they’re a fucking scam anyways. You need a cnc machine and an aerospace welder which is exactly what nasa uses. They aren’t gonna put a 3D printed anything inside an expensive device. That was a prototype..
The German V1 cruise missiles they shot at London in WW2 used a pulse detonation engine. That is why they made that infamous prattling noise people who experienced it often mention. So it can't have been too complicated a principle if it predates the first fully functional jet engine.
That was *pulse* detonation. What NASA are trying to do now is continuous *rotating* detonation. Not at all the same thing.
@@palpytine I know, but he said in the video that high quality alloys are needed to sustain the pressures of pulse detonation engines too, before he moves on to rotating detonation engines.
Pulse jets still burn fuel subsonically like normal engines and even ramjets, whereas scramjets and pulsed/rotating detonation engines burn fuel at supersonic speed, which is incredibly difficult to arrange and maintain, and that's why it's only starting to become possible with modern computer simulations, materials and 3d printing.
The pulse jet in the V1 used a totally different principle. It had a shutter at the front to allow air into the engine, that slammed shut when the combustion happened. It wasn't a detonation, that would have blown the engine apart.
The V1 used a pulse jet not a pulse detonation engine. Very different engines
An exploding tornado. Why does this sound slightly worrying? 😂
@JZ's BFF I mean. Now that America is aware of the possibility of exploding tornadoes... lol
Great video. Like Robert V. ... all important bases covered!!! Thanks.
Thank you for the information
Absolutely amazing.
They'll be fine for thrusters but long burns will hit the cooling barrier that confounds aerospike engines: The cooling demand rises by the cube and the cooling ability rises by the square. The NASA demo engines used a cooling method that's too heavy for flight. Once again Earth just barely lets us into orbit, but we're getting better.
To be fair this type is also likely to be much lighter than that type. Meaning if you do it right you could probably get this one to carry its cooling system as it'll be much lighter itself
awesome video!! I would love to work on things like this!! I'm good at figuring things out!!!!
Nice presentation . This might turn out to be a major breakthrough
My neighbors already hate my cars exhaust. I can't wait to unleash the exploding tornado.
@sabrefayne : Using d.i.y. method, you may try the "pollution reducer filter" (PRF), by "duplicating" the designed of the now existing EURO-5 and the EURO-6 anti pollution device... Such PRF muffler, was being installed at the exhaust pipe of concerned vehicle.. Pls searched the internet on its basic designed, then figure. out on HOW you can "duplicate" it...
NEXT LVL GEN GO GO GO
Love it. Very interesting video, and it’s very clear to me now - all we’ll have to do is place this new engine in front of all the rockets so that they are engulfed in the superheated exhaust. That should certainly destroy the rockets. Great video 👍
Love the video thanks
Very cool concept
Great information. Thanks
This looks cool, I like it
Thanks!
@@Tech_Planet you’re welcome…🙂🙂🙂
fascinating directions this can take. with materials and 3d printing more strange designs are possible
Looks to me that RDEs have a very bright future and I think it is only a matter of time. It will take time to figure out the proper configuration and dynamics for this engine to take us to the next stage of Human space exploration. If we can manufacture an engine that is capable of taking us to Orbit in the way that this engine does, and make it so that it isn't trash after the flight up, then we can begin to make them bigger and more powerful to the point that they are reusable, and fully capable of operating in the vacuum of Space, then this engine is going to be either the engine to take us there, or the father of the engine that'll take us there, or perhaps the grandfather... but it is obvious that we need something more efficient and more practical than a Rocket engine.
This type of breakthrough in science always fascinates me ever since I was a kid👌. I thirst for knowledge
Interesting. I Loved the, tell tale, spaced Diamond Con trails of the 90s-2000s. I wonder whatthese will look like.
What a time to be alive
looks like the future.
3D printing engine parts is so cool since it allows far more complex parts and substantial (low volume) production cost savings. Testing and modifying the design is much faster and cheaper too
Awesome video thanks.
Just some helpful notions. 1. all materials are moving at a intermolecular level. 2. All motion is temperature... just depends on the scale and permability you are trying to reffer to. 3. All alignments are challenged simply by existing, let alone if you are exposing them to explosions. So the tighter the margins, the sooner it will need corrrecting, the lower ability to correct the sooner it will fail. This technology can work. It needs strong attitudes willing to redoubt preconceptions and offer up sophisticated solutions to correct for problems rather than trying to simply change materials. ultrasonic pulses for example are under explored. 4. Fluid dynamics based on a static container can make for more complex calculations than if one was to use a dynamic container, i.e. ultrasonics or laminar flow calipers, that are able to interface with AI and work out what works prior to formulating formula.
Thanks, great points!
It’s like a hybrid between rocket engine and ICE and rotational concept will allow a constantflow through aero spike nozzle out going gases and keep giving constant thrust great idea
Fascinating 😊
I'm a little worried about the rotary component of RDEs introducing guidance issues, but I guess that could be dealt with by having them in counter-rotating pairs like drone rotors.
They already have multiple detonation waves, keeping the number low and stable, so they don't interfere is the challenge.
LOVE IT subscribed
Good stuff
Quite interesting video. I wonder if the RDE would actually be quiter. Because once a machine or device moves alot of air or gas noise is unavoidable.
Excellent video 👍
Mind blowing!
Some nice B roll my bro
Also reminds me of the nuclear rocket detonating nuclear bombs behind it to accelerate it.
Interesting Video, So in a I.C.E. you have deflagration as opposed to detonation, It looks like I'm already subbed to your channel, I will turn on all notifications, as I enjoy this type of content, THX for posting. 👊 😎
Great video. Technical enough to understand how it works. But simple enough that us novice do get lost. 😅
Jack of all atmospheric pressures, master of none.
Rockets will last until AI tells us how to make worm holes to instantly travel anywhere 🤓
If we figure out the bridge between creativity and datasets, anything is possible!
@@Tech_Planet ChatGPT actually just helped me fine tune an active camo design a bit better. Gave me more insight into what refractive index materials I need for the parts. The answer: I need materials with high refractive index, ideally pliable. Polycarbonate is a great candidate and very durable to boot. So uhh. If nobody sees me again in a year or so I might've figured it out and become the ultimate invisible freeloader. Or I've died and become an average invisible freeloader. Lol
Thank you for the insightful video. In 2021 the Japanese space agency JAXA sent into lower earth orbit a rocket retrofitted with a rotating detonating engine, the engine was fired for a bunch of seconds dimming the test successful. the rocket was splashed down into the ocean afterward.
During WWII the Germans experimented with Ram Jet engines using coal dust as the primary fuel. The engine was to be mounted on a Feisler Fi-103 or better known as the V-1. The engine produced similar power to both diesel and gasoline. It never got past the experimental stage.
lol I guess detonation is when your car stalls out for a second but keeps putting out fuel and then suddenly it all detonates inside the exhaust system blowing the muffler clean off the car. Thanks Jeep ZJ
Hi, First time viewer. The rocket engine stuff is great - but I'm interested in the GRCop-42 alloy. Is this alloy available to the general public? I would like to try it as a mold material for my foundry castings. Thanks.
It is but do you have any clue how expensive it is? for castings its not worth it at all youre throwing money away. Youre looking at $250 per kg.
I made 32 inventions in the 80s and 90s. I figured out how to make error free rigid memory disks doing epoxy fluid dynamics in my head. Thanks for the close-ups at 3:50-4:03. How did you make the ripples between the walls in a high pressure device at 4:50? Where to guide the pressure to? Verrry interesting...
Clearly, we are on the cusp of better technology, and its applications will be based on cost over current tech. Perhaps, a new kind of jet for instance? Would it still be called a jet, and would it imbibe confidence in its use? Surely, thats yet to be seen. Thank you, for your efforts in bringing it beyond a test stand! Good Work!!!
NASA's new engine is also an arrowspike, that maintains better thrust from ground presures though vacuum of space.
Would there be a need for two engines or would the discharge jet not spin?
*_Beats Wiley E Coyote's rocket by a mile... time for new technologies.._* Increased noise was listed as a 'negative' attribute. As soon as RDE is high enough, the thin air will no longer transfer noise. Vibrations from extreme noise (high pressure) will stop outside the RDE, but vibrations will continue inside the RDE as they are transferred inside the actual material RDE is constructed from. *_3D printing complex shapes out of new materials will result in successful RDE._*
damn..thats actually pretty effin clever
I could be wrong, but I think for mach speed flow to occur in the cylinder of an operating engine, other than a diesel type, you would have to have detonation, which is a VERY bad thing. Fuel in a properly working gasoline engine does not detonate, in fact the squish areas in a two cycle engine are designed specifically to try to mitigate that at the cylinder extremes. In a diesel it does operate in detonation mode, but those engines are designed to do that, and you can hear it happening when they run, with all that knocking. When you hear that in a gasoline engine, something is very wrong that needs to be quickly corrected, like large amounts of carbon buildup or overly advanced timing. If anyone reads this that really knows what goes on there (meaning a cylinder flow guy) and I am wrong, please set me straight, but I'm pretty sure that is what is going on, dynamically. Pulse jets have been around for a very long time, BTW, even in use. The German V1 'buzz bomb' was a pulse jet, hence the 'buzzing'. Detonation, much of it, in a gasoline engine results in effects like broken spark plugs and holes in pistons. These are not sought after events. Also, I'm pretty sure that detonation is still called combustion. I think combustion just relates to burning, not the rate at which it happens. How is the design redundant. Redundancy means exceeding what is necessary, or a repetitive system, to have a fall back during a failure, like dual mags on a GA aircraft engine, or multiple computers running in parallel on a voting system, like was in the shuttle, so that one failure does not cause the system to fail, though in some cases it may continue to function in a degraded mode. Does a pulse jet design exhibit these characteristics? I also don't know what you mean by "a normal jet engine experiencing total pressure loss" during combustion means. It doesn't, and is constantly burning constantly provided fuel and producing constant thrust within and exiting the engine. It is not a fuel flow pulsed or pulsed burn system. I love it when people say 'we' came up with a new alloy, process, or whatever. 'We' didn't, someone or some team or group of teams or collaborators did. 'We' didn't go to the moon either, though that is said virtually every time, just a handful of astronauts did. Also, these examples are not new physics, just new applications of existing physics. Things like relativity, in their time, were new physics, newly discovered physics anyway. All physics exist, right now, we just haven't uncovered all of them, almost certainly. Sorry if it sounds like I'm constantly picking at you here. You do a good job, I'm just trying to help you make it better. It is intended to be constructive, and you certainly didn't come up with manners of speaking like the 'we' thing. You have introduced me to things I hadn't seen before as an engineer, so thank you for that. :-) You could do a cool video on materials alone. Go look up the transparent steel, essentially, a plastic with 12X the strength to weight of steel, it would be an excellent example to include, if you choose to make such an episode. It results from being able to maintain 3D bonding throughout an entire piece. This bonding was easily producible before, but quickly went ary and the normal 2D polymeric bonding initiated and maintained, creating a normal plastic, like say lexan or plexiglass, which are polycarbonates, etc.
2:47 i love the concept "in theory" free contents with clickbait title LoL
I know what you're trying to do, think of it as a sprinkler. Every time the sprinkler lists off a water spout there's a valve that pushes forward and then hits it to turn this all it is. So basically every time there's an explosion it opens up a valve and then once the bow comes back it turns it and then it opens up again so it means you'll have a constant variable explosion in the same or in different valves without having to worry about the same valve being damaged. It also allows it to cool itself down as it changes between valves like a sprinkler would do every time it turns.
These will do awesome in my new Pod Racer.
I came up with a rotary detonation type engine design back in college like 15 years ago using hydrogen and oxygen, but i never pursued it very far as it was very expensive.
It takes to things to be an inventor, a good idea and financial backing. The concept behind a new technology is usually the easier part unless you already know someone who has deep pockets and the motivation to back you.
I can feel you brother, I made an Aerospike engine when i was in college. Rotary detonation was way too hard and costly to fabricate tiny components for my prototype engine platform.
Dalorath : In my own point of view, rotary engine was just a "modified" steam. powered engine- their similarity in designed was 80- 85%... If steam engine was 40% in efficiency, so any variant of its design- possibly will also have 40% efficiency in power consumption...
@@arielhermoso4262 I would like to share with you my design, but i still have hopes of building it myself one day without being beholden to someone with money lol...
has it a benefit by injecting water into the chamber? To increase pressure and reducing termperature? Does it work?
great video, but you know what would have been nice , hearing the engines that you were showing, justa a heads up :)
Any possible gains in efficiency to be had from multiple pulse jet’s but with a single exhaust exit using some means of alternating firing orders or just using resonance and using active scavenging similar to an i/c engine and extractor’s? Has this been done or at least experimented with?
I'd think at this point the most gain you get get from a single exhaust point would be through MHD bypass and ejector integration to accelerate the exhaust plasma. Do it well enough and you might even prolong the lifespan of the engine by reducing plasma touching the interior walls.
I didn't learn a single thing about this engine in this video besides what alloy it's made of
Thanks!
making the explosiin comes from plasma or electrical discharge might be something they do later , so you will have a small neuclear reactor that will power the electricity needed to generate enough plasma pulses in the engine chamber
Three of the biggest challenges I see is a combination of resilient materials precise cancellation of heat and shock on the inner surface. If the oressure and heat extremes can be sensed and responded to before they reach the combustion wall then it is s matter of providing adequate cancellation support.
I just want the opoc engine to come to market. I would love to see them made and sold as crate engines so I could put them in any kind of car.
1 little thing: 0:10 that's a pulse jet, not a detonation engine. the nuance has to do with flame propagation speed being supersonic for the detonation engine. A pulse jet is way slower; as in "mechanical valves" type of slower.
A Glimpse of Eternity beckons me of faster than light speed craft
Material Science always follows the engine concept design. This is going to get interesting.
Nice one, which software do you use for your video illustration / animation ?
We are going to see some radical engines perfected in the next 20 years.👍
Very interesting.
Do RDE/PDEs get better isp than regular rockets? or is it just better thrust?
much much better ISP because exhaust speed is much faster (F=MV^2) where "V" is most important
A 25% increase in efficiency will make this happen. Less components and thus increase reliability will also be a boon.The issue now is scale.
Yea it will happen as long as the engine can eventually be built for just a few million dollars like current rocket engines can be.
The only real and working aerospike motor manufactured is spanish, the name of the company is Pangea Aerospace. I would even say that these images of the aerospike working correspond to their tests carried out in Germany.
Amazing
I love how research and development can create better solutions for transport. I have to wonder if there is yet an undiscovered technology that will be a quantum leap that will allow speedy transport to other planets or even other stars.
What is the material that holds up to the the heat from the exhaust?
Rocket engines usually flow a cold fluid, such as liquid hydrogen through the exhaust to prevent it from melting
Imagine what you could do if you could control the electromagnetic spectrum down to the atomic level.