On vortex shedding behind a circular disk |
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Authors: | J J Miau T S Leu T W Liu J H Chou |
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Institution: | (1) Institute of Aeronautics and Astronautics National Cheng Kung University, Tainan, 70101 Taiwan, R.O.C., TW;(2) Department of Engineering Science National Cheng Kung University, Tainan, 70101, Taiwan, R.O.C., TW |
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Abstract: | Abtract Experiments were performed for individual realizations of the vortex shedding process behind a circular disk at Reynolds
numbers of 103–105, at which periodic vortex shedding prevails in the wake. The phase differences regarding the individual vortex shedding structures
detected at multiple circumferential locations in the wake were obtained by analyzing the hot-wire signals with a conditional-sampling
scheme. The phase differences of vortex shedding detected at circumferential positions 90° apart show a wide scatter, but
the anti-phase character is largely preserved in the individual vortex shedding process as detected at circumferential locations
180° apart. The randomness of phase differences involved in the vortex shedding process is noted to be essential in order
to satisfy the axisymmetric property of the global flow.
Received: 4 April 19969/Accepted: 29 January 1997 |
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