Journal of the Korean Society for Aeronautical & Space Sciences (한국항공우주학회지)

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
권호 표지
DOI QR코드

DOI QR Code

Effect of Swirl Injector with Variable Backhole on Acoustic Damping in Liquid Rocket Engine

액체로켓 스월인젝터의 음향학적 감쇠기능

  • ;
  • ;
  • ;
  • ;
  • ;
  • ;
  • Bazarov, V. G. (Moscow State Aviation Institute)
  • Published : 2006.08.31
Download PDF
⟨ Previous Next ⟩

Abstract

Swirl injector with adjustable backhole length was analyzed to suppress high-frequency combustion instability in Liquid Rocket Engines. In order to analyze the effect of variable backhole injector as an acoustic absorber, backhole injector was regarded as a quarter-wave resonator. As a result of theoretical approaches and acoustic tests, backhole injector with adjustable length could decrease the unstable modes of combustion chamber. And the damping efficiency was estimated by measuring damping rates experimentally.

액체로켓엔진에서 고주파 연소불안정을 제어하기 위하여 인젝터 길이 변화를 줄 수 있는 백홀 스월 인젝터를 분석하였다. 음향흡수자로서 백홀 인젝터의 효과를 분석하기위하여 백홀 인젝터는 1/4 파장 공명기로 해석하였다. 이론적 접근과 음향 실험의 결과로부터 가변적 변위를 갖는 백홀 스월 인젝터가 연소실의 불안정 모드를 감소시킴을 알 수 있었다. 실험적으로 감쇠율을 측정하여 감쇠효과를 측정하였다.

Keywords

References

  1. Culick, F.E.C. and Yang, V., 'Overview of Combustion Instabilities in Liquid-Propellant Rocket Engines', Progress in Astronautics and Aeronautics, Vol. 169, 1995
  2. Harrje, D. T. and Reardon, F. H., (eds) Liquid Propellant Rocket Combustion Instability, NASA SP-194,1972
  3. Huang Yuhui, 'Acoustic Model for the Self-oscillation of Coaxial Swirl Injector', 33rd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, Seattle, WA, 1997
  4. 박이선, 손채훈, '액체 로켓엔진 분사기의 음향감쇠 효과에 관한 수치적 연구', 한국항공우주학회지, 제 33권, 제 5호, 2005 https://doi.org/10.5139/JKSAS.2005.33.5.079
  5. Hwang, Seong-Ha, Backhole as a New Geometric Parameter and Acoustic Damper for the Swirl Injector, Mater thesis, Soul National University, 2004
  6. Laudien, E., Pongratz, R, and Preclik, D., in Liquid Rocket Engine Combustion Instability (Yang, V. and Anderson, W. E.m eds), Progress in Astronautics and Aeronautics, Vol. 169, AIAA, Washington DC, 1995, pp. 377-399
  7. Zucrow, M. J. and Hoffman, J. D., Gas Dynamics vol. II, Multicimensional Flow, John Wiley and Sons, Inc., 1977
  8. Kinsler, L. E., Frey, A. R, Coppens, A. B. and Sanders, J. V., Fundamentals of Acoustics, 4th ed. John Wiley & Sons, Inc., 2000
  9. V.G. Bazarov, Liquid Propellant Rocket Engine Injectors, Invited Lecture of V. Bazarov, Rocket Propulsion Lab., Seoul National University, 2002
  10. V. G. Bazarov, Liquid Injector Dynamics, Moscow, Mashinostroenie, 1979