Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)
- Volume 20 Issue 12
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- Pages.3980-3990
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- 1996
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- 1226-4881(pISSN)
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- 2288-5324(eISSN)
DOI QR Code
Passive control of condensation shock wave in supersonic nozzles
초음속 노즐에서 발생하는 응축충격파의 피동제어
- Kim, Hui-Dong (Dept.of Mechanical Engineering, Andong National University) ;
- Gwon, Sun-Beom ;
- Setoguchi, Toshiaki (Saga Univ.)
- Published : 1996.12.01
Abstract
When a moist air is rapidly expanded in a supersonic nozzle, nonequilibrium condensation occurs at a supersaturation state. Condensation shock wave appears in the nozzle flow if the releasing latent heat due to condensation goes beyond a critical value. It has been known that self-excited oscillations of the condensation shock wave generate in an air or a steam nozzle flow with a large humidity. In the present study, the passive control technique using porous wall with a cavity underneath was applied to the condensation shock wave. The effects of the passive control on the steady and self-excited condensation shock waves were experimentally investigated by Schlieren visualization and static pressure measurements. The result shows that the present passive control is a useful technique to suppress the self-excited oscillations of condensation shock wave.
Keywords