Abstract
An experimental study was made of turbulent separated and reattaching flow over a blunt body, where unsteady wake was generated by a spoked-wheel type of wake generator with cylindrical rods. The influence of unsteady wake was scrutinized by altering the rotation direction (clockwise and counter-clockwise) and the normalized passing frequency (0 ≤ St H ≤ 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 rotation directions, which gave a significant reduction of x R , was examined in detail. The wall pressure fluctuations on the blunt body were analyzed in terms of the spectrum and the coherence.
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Received: 15 January 2001 / Accepted: 17 July 2001
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Chun, S., Sung, H. Influence of unsteady wake on a turbulent separation bubble . Experiments in Fluids 32, 269–279 (2002). https://doi.org/10.1007/s003480100357
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DOI: https://doi.org/10.1007/s003480100357