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

  • 제30권1호
  • /
  • Pages.32-40
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  • 2006
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  • 1226-4881(pISSN)
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  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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로켓연소실에서 음향공의 음향학적 감쇠에 대한 정량적 고찰

A Study on the Acoustic Damping Characteristics of Acoustic Cavities in a Liquid Rocket Combustor

  • 김홍집 (한국항공우주연구원 연소기그룹) ;
  • 김성구 (한국항공우주연구원 연소기그룹)
  • 발행 : 2006.01.01
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초록

A linear acoustic analysis has been performed to elucidate damping characteristics of acoustic cavities in a liquid rocket combustor. Results have shown that resonant frequencies of acoustic cavity obtained by classical theoretic approach and by the present linear analysis are somewhat different with each other. This difference is attributed to the limitation of the simplified classical theory. To quantify the damping characteristics, acoustic impedance has been introduced and resultant absorption coefficient and conductance have been evaluated. Satisfactory agreement has been achieved with previous experiment. Finally the design procedure for an optimal tuning of acoustic cavity has been established.

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참고문헌

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