한국추진공학회:학술대회논문집 (Proceedings of the Korean Society of Propulsion Engineers Conference)
- 한국추진공학회 2008년 영문 학술대회
- /
- Pages.266-271
- /
- 2008
- /
- 1975-342X(pISSN)
Numerical Study of Pressure Waves Generated by H-IIA Launch Vehicle at Lift-off
- Tsutsumi, Seiji (Japan Aerospace Exploration Agency) ;
- Shimizu, Taro (Japan Aerospace Exploration Agency) ;
- Takaki, Ryoji (Japan Aerospace Exploration Agency) ;
- Shima, Eiji (Japan Aerospace Exploration Agency) ;
- Fujii, Kozo (Japan Aerospace Exploration Agency) ;
- Arita, Makoto (Japan Aerospace Exploration Agency)
- 발행 : 2008.03.30
초록
Generation mechanisms of pressure waves from the H-IIA launch vehicle are analyzed numerically. The Mach wave radiated downstream from wavy shearlayer of supersonic exhaust plume is revealed to be the dominant noise source. Reflecting from the constructions of the launch-pad, the Mach wave turns to propagate to the vehicles. It was also found that the fluctuating supersonic plume entering into the flame duct is the dominant noise source that appears in the flame duct. Then, the pressure wave propagates through the flame duct and is ejected outside to the vehicle.