In this study, by reproducing flowfields of several kinds of cavitation instabilities by numerical simulation of unsteady cavitation in three blades cyclic cascade, occurrence mechanism of rotating cavitations in cascade are attempted to clarify. “The order of appearance of rotating cavitations” and “the discontinuity of the propagation speed at the transition” are still not clarified. From the present study, it is found that they can be explained by existence of latent rotating-stall and decrease of frequency of cavity break-off with development of the cavity. And our numerical results agree with the predicted rotating speed of rotating cavitation and break-off frequency of cavitation. Additionally, difference of sub-synchronous rotating cavitation and rotating-stall cavitation, they are both sub-synchronous phenomenon but have different propagation speed, is explained according to their occurrence mechanism.
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ASME 2009 Fluids Engineering Division Summer Meeting
August 2–6, 2009
Vail, Colorado, USA
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-4372-7
PROCEEDINGS PAPER
A Study of Propagating Speed of Rotating Cavitation Based on Numerical Analysis
Yoshiki Yoshida
Yoshiki Yoshida
Japan Aerospace Exploration Agency (JAXA), Kakuda, Japan
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Yuka Iga
Tohoku University, Sendai, Japan
Yoshiki Yoshida
Japan Aerospace Exploration Agency (JAXA), Kakuda, Japan
Paper No:
FEDSM2009-78411, pp. 399-405; 7 pages
Published Online:
July 26, 2010
Citation
Iga, Y, & Yoshida, Y. "A Study of Propagating Speed of Rotating Cavitation Based on Numerical Analysis." Proceedings of the ASME 2009 Fluids Engineering Division Summer Meeting. Volume 1: Symposia, Parts A, B and C. Vail, Colorado, USA. August 2–6, 2009. pp. 399-405. ASME. https://doi.org/10.1115/FEDSM2009-78411
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