Three types of cavitation instabilities through flat plate cascades, which are similar to “forward rotating cavitation,” “rotating-stall cavitation” and “cavitation surge” occurring in high-speed rotating fluid machinery, are represented numerically under the three-blade cyclic condition. A numerical method employing a locally homogeneous model of compressible gas-liquid two-phase medium is applied to solve the above flow fields, because this permits the entire flow field inside and outside the cavity to be treated through only one system of governing equations. In addition, the numerical method suites to analyze unsteady cavitating flow with a long time evolution. From the calculated results of the present numerical simulation with wide range of cavitation number and flow rate, we obtain a cavitation performance curve of the present three-blade cyclic cascade, analyze the aspects of unsteady cavitation, and discuss the characteristics and mechanisms of cavitation.
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Numerical Analysis of Cavitation Instabilities Arising in the Three-Blade Cascade
Yuka Iga, Research Associate,
Yuka Iga, Research Associate
Institute of Fluid Science, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai, Miyagi, 980-8577, Japan
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Motohiko Nohml, Senior Researcher,
Motohiko Nohml, Senior Researcher
Ebara Research Co., Ltd, 11-1, Haneda Asahi-cho, Ohta-ku, Tokyo, 144-8510, Japan
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Akira Goto, Director,
Akira Goto, Director
Ebara Research Co., Ltd, 4-2-1, Honfujisawa, Fujisawa, 251-8502, Japan
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Toshiaki Ikohagi, Professor
Toshiaki Ikohagi, Professor
Institute of Fluid Science, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai, Miyagi, 980-8577, Japan
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Yuka Iga, Research Associate
Institute of Fluid Science, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai, Miyagi, 980-8577, Japan
Motohiko Nohml, Senior Researcher
Ebara Research Co., Ltd, 11-1, Haneda Asahi-cho, Ohta-ku, Tokyo, 144-8510, Japan
Akira Goto, Director
Ebara Research Co., Ltd, 4-2-1, Honfujisawa, Fujisawa, 251-8502, Japan
Toshiaki Ikohagi, Professor
Institute of Fluid Science, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai, Miyagi, 980-8577, Japan
Contributed by the Fluids Engineering Division for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received by the Fluids Engineering Division May 2, 2003; revised manuscript received February 9, 2004. Associate Editor: Y. Tsujimoto.
J. Fluids Eng. May 2004, 126(3): 419-429 (11 pages)
Published Online: July 12, 2004
Article history
Received:
May 2, 2003
Revised:
February 9, 2004
Online:
July 12, 2004
Citation
Iga, Y., Nohml, M., Goto, A., and Ikohagi, T. (July 12, 2004). "Numerical Analysis of Cavitation Instabilities Arising in the Three-Blade Cascade ." ASME. J. Fluids Eng. May 2004; 126(3): 419–429. https://doi.org/10.1115/1.1760539
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