Theoretical Analysis of Transitional and Partial Cavity Instabilities

[+] Author and Article Information
Satoshi Watanabe

Faculty of Engineering, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japane-mail: fmnabe@mech.kyushu-u.ac.jp

Yoshinobu Tsujimoto

Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka 560-8581, Japane-mail: tujimoto@me.es.osaka-u.ac.jp

Akinori Furukawa

Faculty of Engineering, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japane-mail: fmfuru@mech.kyushu-u.ac.jp

J. Fluids Eng 123(3), 692-697 (Mar 30, 2001) (6 pages) doi:10.1115/1.1378295 History: Received November 15, 2000; Revised March 30, 2001
Copyright © 2001 by ASME
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Comparisons of reduced frequency based on mean cavity length between present results and Mode I in Fig. 6
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Results of linearly decreasing cavitation number from σ−L=0.35 to 0.2 within t=0–30C/U. (a) Time histories of parameters; (b) limit cycle; (c) cavity shapes.
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Comparisons of Strouhal number between present study and experiments. (a) Present study; (b) experimental results; (c) amplitude of cavity length fluctuation.
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Results of stability analysis for various cavity lengths
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Cavity model in semi-infinite 2-D channel
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Steady cavity length and mean cavity length of present analysis
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Time histories of cavitation number at duct inlet, cavity length, cavity volume, and pressure coefficient for the case of step change in cavitation number from σ−L=0.523 to 0.530 at t=0




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