Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Acoustic Response of Hydrogen/Liquid Oxygen Flame in Stagnation-Point Flow

정체점 유동장에서 수소-액체산소 화염의 음향파 응답 특성

  • 박성우 (대우일렉트로닉스 냉기연구소 품질기획그룹) ;
  • 정석호 (서울대학교 기계항공공학부) ;
  • 김홍집 (한국항공우주연구원 추진기관연구부)
  • Published : 2003.04.01
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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.

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References

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