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TECHNICAL PAPERS

Theoretical Analysis of Cavitation in Inducers With Unequal Blades With Alternate Leading Edge Cutback: Part I—Analytical Methods and the Results for Smaller Amount of Cutback

[+] Author and Article Information
Hironori Horiguchi

Osaka University, Graduate School of Engineering Science, 1-3 Machikaneyama, Toyonaka, Osaka, 560-8531 Japane-mail: horiguti@me.es.osaka-u.ac.jp

Satoshi Watanabe

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

Yoshinobu Tsujimoto

Osaka University, Graduate School of Engineering Science, 1-3 Machikaneyama, Toyonaka, Osaka, 560-8531 Japane-mail: tujimoto@me.es.osaka-u.ac.jp

J. Fluids Eng 122(2), 412-418 (Feb 01, 2000) (7 pages) doi:10.1115/1.483271 History: Received June 07, 1999; Revised February 01, 2000
Copyright © 2000 by ASME
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References

Figures

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Cascade with leading edge cutback
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Steady cavity length and its stability for the cascades with the amount of leading edge cutback, Le/h=0.0 and 0.2, from the original cascade with (C/h=2.0, β=80 deg)
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Steady cavity shape for the cascade with C/h=2.0, β=80 deg and Le/h=0.2 for α=4 deg (the conditions for each case are shown by (a)–(h) in Fig. 2)
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Results of statical stability analysis of steady cavitation for the cascade with the alternate leading edge cutting with Le/h=0.2. The original cascade is with C/h=2.0 and β=80 deg. It is assumed that θ0,21,3=0 deg and unstable modes are plotted for the steady cavitation corresponding to equal length cavitation shown by the solid lines in the upper part of each figure. (a) Reduced frequency, (b) phase difference.
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The same as Fig. 4, for the steady cavitation corresponding to alternate blade cavitation. (a) Reduced frequency, (b) phase difference.
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Results of stability analysis for rotating cavitation for the equal blade cascade with C/h=2.0 and β=80 deg. It is assumed that θ0,21,3=180 deg and unstable modes are plotted for the equal length cavitation shown by the solid lines in the upper part of each figure.
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The same as Fig. 6, for the alternate blade cavitation. (a) Reduced frequency, (b) phase difference.
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Results of stability analysis for rotating cavitation for the cascade with the alternate leading edge cutting with Le/h=0.2. The original cascade is with C/h=2.0 and β=80 deg. It is assumed that θ0,21,3=180 deg and unstable modes are plotted for the steady cavitation corresponding to equal length cavitation shown by the solid lines in the upper part of each figure. (a) Propagation velocity ratio, (b) phase difference.
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The same as Fig. 8, for the steady cavitation corresponding to alternate blade cavitation. (a) Reduced frequency, (b) phase difference.

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