Proceedings of the Korean Society of Propulsion Engineers Conference (한국추진공학회:학술대회논문집)
- 2008.11a
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- Pages.341-344
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- 2008
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- 1975-342X(pISSN)
The Unsteady Cavity Flow Oscillation in Supersonic Moisture Air Stream
초음속 습공기 유동에서 비정상 공동유동의 진동
- Shin, Choon-Sik ;
- Lee, Jong-Sung ;
- Kim, Heuy-Dong ;
- Setoguchi, Toshiaki (Department of Mechanical Engineering, Saga University)
- Published : 2008.11.13
Abstract
Numerical simulations have been carried out for a supersonic two-dimensional flow over open, rectangular cavities (length-to-depth ratios are L/D = 1.0) in order to investigate the effect of non-equilibrium condensation of moist air on supersonic flows around the cavity for the flow Mach number 1.83 at the cavity entrance. In the present computational investigation, a condensing flow was produced by an expansion of moist air in a Laval nozzle. The results obtained showed that in the case with non-equilibrium condensation for L/D = 1.0, amplitudes of oscillation in the cavity became smaller than those without the non-equilibrium condensation. Furthermore, the occurrence of the non-equilibrium condensation reduced the peaks of power spectrum density and the frequency of the flow field oscillation increased in comparison with the case of