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

The Korean Society of Mechanical Engineers (대한기계학회)
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Acoustic Analysis for Design Optimization of Hub-Blade Baffle in Liquid Rocket Engine

액체로켓엔진에서 음향해석을 통한 허브-블레이드 배플 형상의 최적화

  • 김홍집 (한국항공우주연구원 엔진그룹) ;
  • 김성구 (한국항공우주연구원 엔진그룹) ;
  • 설우석 (한국항공우주연구원 엔진그룹)
  • Published : 2004.08.01
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Abstract

Acoustic characteristics of combustion chamber having various baffle configurations are numerically investigated by linear acoustic analysis to suggest reliable baffle specifications in first stage of KSLV-I. To determine the configuration of baffles, an acoustic modal analysis as well as the macroscopic analysis has been done. Hub has another effect of suppressing transverse acoustic mode by confining flow in baffled compartment over general effect of increase in acoustic damping of radial acoustic modes. So, a sufficient number of hub needs to be installed to obtain acoustic damping capacity. 3-blade configuration designed to suppress the first tangential mode has relatively low damping capacity, compared to 5 or 6-blade one. Optimum value of axial baffle length has been determined by comparing acoustic characteristics of combustion chamber having various baffle lengths.

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References

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