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TECHNICAL PAPERS

Modeling of 2-D Leakage Jet Cavitation as a Basic Study of Tip Leakage Vortex Cavitation

[+] Author and Article Information
Satoshi Watanabe

Faculty of Engineering, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581 Japan

Hiraku Seki, Seiji Higashi, Kazuhiko Yokota, Yoshinobu Tsujimoto

Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560-8531 Japan

J. Fluids Eng 123(1), 50-56 (Oct 13, 2000) (7 pages) doi:10.1115/1.1340634 History: Received March 22, 2000; Revised October 13, 2000
Copyright © 2001 by ASME
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References

Young, W. E., 1972, “Study of Cavitating Inducer Instabilities, Final Report,” NASA-CR-123939.
Kamijo,  K., Yoshida,  M., and Tsujimoto,  Y., 1993, “Hydraulic and Mechanical Performance of LE-7 LOX Pump Inducer,” AIAA Journal of Propulsion and Power, 9, No. 6, pp. 819–826.
Tsujimoto,  Y., Kamijo,  K., and Yoshida,  Y., 1993, “A Theoretical Analysis of Rotating Cavitation in Inducers,” ASME J. Fluids Eng., 115, pp. 135–141.
Brennen,  C. E., 1978, “Bubbly Flow Model for the Dynamic Characteristics of Cavitating Pumps,” J. Fluid Mech., 89, pp. 223–240.
Otsuka,  S., Tsujimoto,  Y., Kamijo,  K., and Furuya,  O., 1996, “Frequency Dependence of Mass Flow Gain Factor and Cavitation Compliance of Cavitating Inducers,” ASME J. Fluids Eng., 118, pp. 400–408.
Rains, D. A., 1954, “Tip Clearance Flows in Axial Compressors and Pumps,” California Institute of Technology, Hydrodynamic and Mechanical Engineering laboratories Report No. 5.
Chen,  G. T., Greitzer,  E. M., Tan,  C. S., and Marble,  F. E., 1991, “Similarity Analysis of Compressor Tip Clearance Flow Structure,” ASME J. Turbomach., 113, pp. 260–271.

Figures

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Example of pictures of cavitation in the two-dimensional tip leakage flow (τ=6.2 [mm], P0=5 [kPa])
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Model for present calculation
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Comparisons of cavity behavior between calculations (I)–(III) and experiment (τ=6.2 [mm],P0=5 [kPa]. Uncertainties in the location of center of cavity and cavity size are 1 [mm] and 20 [mm2 ], respectively).
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Comparisons of distributions of discrete vortices between calculations (I)–(II) and (III) (τ=6.2 [mm],P0=5 [kPa])
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Time histories of leakage velocity and downstream pressure (τ=6.2 [mm],P0=5, 7 and 9 [kPa]. Uncertainties in the leakage velocity and downstream pressure are 0.5 [m/s] and 0.1 [kPa], respectively).
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Influence of downstream pressure on cavity behavior (τ=6.2 [mm],P0=5, 7 and 9 [kPa]. Uncertainties in the location of center of cavity and cavity size are 1 [mm] and 20 [mm2 ], respectively).
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Time histories of leakage velocity and downstream pressure (τ=4.4, 6.2 and 9.6 [mm], P0=5 [kPa]. Uncertainties in the leakage velocity and downstream pressure are 0.5 [m/s] and 0.1 [kPa], respectively).
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Influence of tip clearance τ on cavity behavior (τ=4.4, 6.2 and 9.6 [mm], P0=5 [kPa]. Uncertainties in the location of center of cavity and cavity size are 1 [mm] and 50 [mm2 ], respectively).

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