Hydrogen/Air Pulsed Detonation Engine Ground Test

This video shows two ground tests of a hydrogen/air pulsed detonation engine performed at the UT Arlington Aerodynamics Research Center. The PDE uses a solenoid valve fuel injection system, a modified automotive ignition and automotive spark plugs. The inner diameter of the tube is 0.75 inches.

Category:

Science & Technology

Tags:

• aviation
• aerospace
• engine
• detonation
• pulse
• pde

[smilingpug]

Isn't the PDWE supposed to burn the fuel on the outside of the craft? This way it can create the aft conical bow shock wave, "the air spike", to let it travel through the turbulence at mach 8?

[emb8]

I think you are talking about the external burning concept that has been studied mostly for scramjet engines and hypersonic airframes. I don't recall seeing any design attempts to integrate it with a pulsed detonation engine, and I think it would be difficult because the external aircraft aerodynamics need to be stable while the engine is cyclical.

[wizardman42]

I suspect this is the ground work for the Arora , skunk works plane that is SUPPOSED to be top secret , leaves a distinct con trail , Pearls on a string or string of doughnuts . I have only wittinessed the doughnut con trail one time , Some say at mach 6 the doughnuts turn into a corkscrew con trail

[askingstuff]

@emb8 (continued) now for the valve; get four superalloy plates, and put two of them on a axis placed up front, positioned parallel to the engine. behind those two is the other plates placed horizontally to the engine. both front and back plates will rotate with each other, kick started by a small motor (that will not run forever), and carried on with detonations. all four plates, will only be half exposed to aerodynamically; i don't know how to explain this very well.

[askingstuff]

@emb8 in terms of design, we have a solid way to start DDT in our engines. the only problem now is damage and heat. for heat, we use the materials used in the HISTED engine which allowed a turbojet to have 6 times the specific thrust that a j58, and get arrested for possessing such material. the second problem is the spring, we will instead turn shchelkin spiral, into a shchelkin threading (like a female bolt), sacrificing cost.

[snappyboy1]

The optimal nozzle configuration changes as the speed of the propelled vehicle increases. At subsonic speeds the nozzle is constrictive, and becomes ever expanding until at many times the speed of sound the nozzle is most efficient when it is surrounding a thrust body. Like a coanda thrust body configuration. I would think It would require huge amounts of fuel .Great channel.

[MrMicraphone]

That is awesome .. you can see the flame spit h2o vapor .. I wonder if damp weather would increase your burn ?

[Bamchucknorris]

Sounds like an mg42 lol

[nickcars100]

@smilingpug i think it is called the pulse detonation wave engine.. i think not to sure

[nickcars100]

@emb8 i think it is called the pulse detonation wave engine.. i think not to sure

[imagod117]

YES!