한국전산유체공학회:학술대회논문집
- 한국전산유체공학회 2004년도 춘계 학술대회논문집
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- Pages.154-159
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- 2004
노즐 압력비와 충돌면까지의 거리 변화에 따른 초음속 충돌 제트 유동의 진동 특성
Oscillatory Features of Supersonic Impinging Jet Flows; Effects of the Nozzle Pressure Ratio and Nozzle Plate Distance
초록
Numerical simulations of supersonic impinging jet flows are carried out using the axisymmetric Navier-Stokes code. This paper focuses on the oscillatory flow features associated with the variation of the nozzle pressure ratio and nozzle-to-plate distance. Frequencies of the surface pressure oscillation from computational results are in accord with the measured impinging tones for various cases of nozzle-to-plate distance. The variation of this frequency with distance show a staging behavior. Computed results for the case of nozzle pressure ratio variation for a fixed nozzle-to-plate distance also demonstrate a staging behavior. These two seemingly different staging behaviors are found to obey the same frequency-distance characteristics when the frequency and the distance are normalized by using the length of the shock cell.
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