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http://dx.doi.org/10.3795/KSME-B.2003.27.4.440

Acoustic Response of Hydrogen/Liquid Oxygen Flame in Stagnation-Point Flow  

Park, Sung-Woo (대우일렉트로닉스 냉기연구소 품질기획그룹)
Chung, Suk-Ho (서울대학교 기계항공공학부)
Kim, Hong-Jip (한국항공우주연구원 추진기관연구부)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.27, no.4, 2003 , pp. 440-446 More about this Journal
Abstract
Steady-state structure and acoustic pressure responses of GH$_2$-LOx diffusion flames in stagnation-point flow configuration have been studied numerically with a detailed chemistry to investigate the acoustic instabilities. The Rayleigh criterion is adopted to judge the instability of the GH$_2$-LOx flames from amplification and attenuation responses at various acoustic pressure oscillation conditions for near-equilibrium to near-extinction regimes. Steady state flame structure showed that the chain branching zone is embedded in surrounding two recombination zones. The acoustic responses of GH$_2$-LOx flame showed that the responses in near-extinction regime always have amplification effect regardless of realistic acoustic frequency. That is, GH$_2$-LOx flame near-extinction is much sensitive to pressure perturbation because of the strong effect of a finite-chemistry.
Keywords
Acoustic Instabillity; Hydrogen/Liquid Oxygen Flame; Rayleigh Criterion; Extinction; Nonlinear Response;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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