Harmonic Dampening inside of a combustion chamber

[Algorithmic]

Could anyone recommend any literature on harmonic dampening inside of a combustion chamber (augmented injector plates and chamber geometry to reduce vibration)? It seems resources are rather scarce on the subject so if anyone knows of any websites, books, papers, etc. that might be helpful, I would be very appreciative.

Also, does anyone know of a good active forum dedicated to full size rocketry? I've been running across nothing but model forums in my search which doesn't pertain to my current goal.

-Darren Levine

 

[AlephZero]

Try googling for "combustor rumble", if you haven't done that already.

But the only "hard information" I have come across on this is commercially confidential, which isn't any help to you, unfortunately.

 

[mugaliens]

Well, I think in the old days, 99% of the failures blew up on the launch pad as they exceeded hoped-for nozzle critical limit failure limits. I don't even know if that's the right terminology.

I'm not a rocket scientist, but I know quite a few of these sorts of folks who are experts in nozzle geometries live and work there. At NASA.

 

[EdL]

Could anyone recommend any literature on harmonic dampening inside of a combustion chamber (augmented injector plates and chamber geometry to reduce vibration)? It seems resources are rather scarce on the subject so if anyone knows of any websites, books, papers, etc. that might be helpful, I would be very appreciative.

If I understand your question properly, you're asking about Helmholtz Resonators and such.

http://en.wikipedia.org/wiki/Helmholtz_resonance

You might check out NASA Technical Report Server:

http://ntrs.nasa.gov/search.jsp

or Defense Technical Information Center

http://www.dtic.mil/dtic/

Also, does anyone know of a good active forum dedicated to full size rocketry? I've been running across nothing but model forums in my search which doesn't pertain to my current goal.

Have you checked out aRocket:

http://exrocketry.net/mailman/listinfo/arocket [Broken]

Cheers,
Ed L

 

[Algorithmic]

Thanks for the help guys, this will definitely help me move in the right direction! I'll do some more research to see if I can get a result.
Thanks,
Darren Levine