Register here

Author Topic: Aerojet Rotating Detonating Engine  (Read 865 times)

Offline bobbymike

  • CLEARANCE: Top Secret
  • ***
  • Posts: 8490
Aerojet Rotating Detonating Engine
« on: May 04, 2018, 06:58:46 am »
https://aerospaceamerica.aiaa.org/departments/increasing-engine-efficiency/


Quote
A turbine engine must generate a uniform flow of combustion gases to spin its blades without excessive wear or risk of damage. A conventional turbine engine avoids damaging spikes in temperature and pressure by allowing the volume of gas to expand, which encourages even deflagration, the term for the rapid burning of the fuel-air mixture as it’s sprayed or injected into the combustor. The resulting stream of combustion gases rushes through the engine, spinning turbine blades before it exits.

Aerojet Rocketdyne’s Advanced Programs-Rocket Shop in Alabama is working on a radically different combustor design, one that would release energy in a rapid, continuous succession of detonations set off by shockwaves rotating inside a cylindrical combustor. Less fuel would be burned to turn the blades at a given speed, but the engineers must avoid subjecting the turbine blades to fluctuations in temperature and pressure that could damage them or wear them out too soon.
Books are the quietest and most constant of friends; they are the most accessible and wisest of counselors, and the most patient of teachers.

Charles W. Eliot

Offline Grey Havoc

  • Senior Member
  • CLEARANCE: Top Secret
  • **
  • Posts: 7959
  • The path not taken.
Re: Aerojet Rotating Detonating Engine
« Reply #1 on: December 06, 2018, 03:45:19 am »
A cousin of the Pulse Detonation Engine, you could say.
The sole imperative of a government, once instituted, is to survive.

Offline Foo Fighter

  • CLEARANCE: Top Secret
  • ***
  • Posts: 544
  • I came, I saw, I drank some tea (and had a bun).
Re: Aerojet Rotating Detonating Engine
« Reply #2 on: December 10, 2018, 03:27:54 am »
It would be interesting to see a diagram of the process.

Offline sferrin

  • Senior Member
  • CLEARANCE: Top Secret
  • **
  • Posts: 10933
Re: Aerojet Rotating Detonating Engine
« Reply #3 on: December 10, 2018, 05:21:03 am »
One would think it would be noisy as hell.
"DARPA Hard"  It ain't what it use to be.

Offline marauder2048

  • CLEARANCE: Top Secret
  • ***
  • Posts: 2052
  • "I should really just relax"
Re: Aerojet Rotating Detonating Engine
« Reply #4 on: December 10, 2018, 12:05:27 pm »
One would think it would be noisy as hell.

The kHz operational frequency produces an audible screech.

Offline sferrin

  • Senior Member
  • CLEARANCE: Top Secret
  • **
  • Posts: 10933
Re: Aerojet Rotating Detonating Engine
« Reply #5 on: December 10, 2018, 12:12:20 pm »
One would think it would be noisy as hell.

The kHz operational frequency produces an audible screech.

But would it be louder than the Thunderscreech?   :D
"DARPA Hard"  It ain't what it use to be.

Offline marauder2048

  • CLEARANCE: Top Secret
  • ***
  • Posts: 2052
  • "I should really just relax"
Re: Aerojet Rotating Detonating Engine
« Reply #6 on: December 10, 2018, 01:29:47 pm »
In those test rig enclosures, I find the pulsed





and continuous



to be hard on the ears.