Harmonic Dampening inside of a combustion chamber

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SUMMARY

The discussion centers on harmonic dampening within combustion chambers, specifically focusing on augmented injector plates and chamber geometry to mitigate vibrations. Participants recommend resources such as the NASA Technical Report Server and the Defense Technical Information Center for relevant literature. The concept of Helmholtz Resonators is also mentioned as a potential area of study. Additionally, users seek active forums dedicated to full-size rocketry, with a suggestion to explore aRocket for community engagement.

PREREQUISITES
  • Understanding of harmonic dampening principles in combustion systems
  • Familiarity with injector plate design and chamber geometry
  • Knowledge of Helmholtz Resonators and their applications
  • Experience with technical research databases like NASA Technical Report Server
NEXT STEPS
  • Research "Helmholtz Resonators" and their impact on combustion chamber design
  • Explore the NASA Technical Report Server for relevant studies on combustion dynamics
  • Investigate the Defense Technical Information Center for technical papers on vibration reduction
  • Join and participate in the aRocket forum for discussions on full-size rocketry
USEFUL FOR

Aerospace engineers, combustion chamber designers, and rocketry enthusiasts seeking to enhance their understanding of vibration control in propulsion systems.

Algorithmic
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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
 
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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.
 
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.
 
Algorithmic said:
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/


Algorithmic said:
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

Cheers,
Ed L
 
Last edited by a moderator:
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
 

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