난류박리기포에 대한 비정상 후류의 영향Influence of Unsteady Wake on a Turbulent Separation Bubble

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An experimental study was made of turbulent separated and reattaching flow over a blunt body, where unsteady wake was generated by a spoke wheel-type wake generator with cylindrical rods. The influence of unsteady wake was scrutinized by altering the rotating direction (CW and CCW) and the normalized passing frequency $(0{\leq}St_H{\leq}0.20)$. The Reynolds number based on the cylindrical rod was $Re_d=375$. A phase-averaging technique was employed to characterize the unsteady wake. The effect of different rotating directions was examined in detail, which gave a significant reduction of $X_R$. The wall pressure fluctuations on the blunt body were analyzed in terms of the spectrum and the coherence.
Publisher
대한기계학회
Issue Date
2001
Language
KOR
Citation

대한기계학회 추계학술대회 , pp.294 - 299

URI
http://hdl.handle.net/10203/137359
Appears in Collection
ME-Conference Papers(학술회의논문)
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