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Analysis on damping effect of vibration baffles with protruded injectors and longitudinal ribs(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2013年03期
Page:
32-37
Research Field:
研究与设计
Publishing date:

Info

Title:
Analysis on damping effect of vibration baffles with protruded injectors and longitudinal ribs
Author(s):
GUO Can-lin;  LU Gang;  CHEN Jian-hua;  WU Hai-bo
Xi’an Aerospace Propulsion Institute, Xi’an 710100, China
Keywords:
thrust chamber;  combustion instability;  vibration baffle;  dissipation
PACS:
V434.24-34
DOI:
-
Abstract:
Dissipation mechanism of vibration baffles with protruded injectors is investigated by establishing an acoustic model and conducting a single injector acoustic simulation test. The vortex around longitudinal ribs is analyzed with numerical method. Based on acoustic theory, the sound field of vibration baffles with longitudinal ribs is studied. The results show that the stability effect of vibration baffles with protruded injectors is better than that of conventional vibration baffles if appropriate clearance is chosen, the main area producing vortex is around longitudinal ribs, and for effect on acoustic characteristic, the height of ribs is more important than the length of ribs.

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Memo

Memo:
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Last Update: 1900-01-01