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ISSN: 1065-3090 Print
ISSN: 1940-4336 Online
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DOI: 10.1615/JFlowVisImageProc.v15.i4
Pages: 96
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DOI: 10.1615/JFlowVisImageProc.v15.i4.60
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Article price - $35.00 |
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FLOW CHARACTERISTICS NEAR THE "INTERFERENCE KNOT POINT" INSIDE A DIAMOND-SHAPED CYLINDER BUNDLE
Shinji Shigeyama
Fukuyama University, Gakuen-cho, Fukuyama, Hiroshima, 729-0292, JAPAN
Tomonori Wakabayashi
Koseikensetsu Company, Higashi-ku, Hiroshima, 732-0056, JAPAN
Shinzaburo Umeda
Department of Architecture and Civil Engineering, Fukuyama University
Wen-Jei Yang
Department of Mechanical Engineering and Applied Mechanics, University of Michigan, Ann Arbor, Michigan 48109
ABSTRACT
The interaction between the oscillating jet and the wedge produces a fluctuating flow field outside the jet which in turn affects the motion of the jet. However, microscopic evidence of these phenomena remains undisclosed. In the present study, an optical system-operated PIV technique was employed to obtain the time-wise variations of both the velocity-vector and vorticity distributions near an "interference knot point" inside a diamond-shaped cylinder bundle. In conclusion, the micro PIV measurements have for the first time disclosed the location and flow process characteristics of the edge-tone source. In addition, the micro flow behavior of reciprocating migration of the conjunct separation vortex pair over the rear edge of the third-row cylinder is confirmed as the mechanism of flip-flow oscillations induced by the edge tone phenomenon.
pages 351-364
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