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International Journal of Rotating Machinery
Volume 7, Issue 6, Pages 397-404

Effects of Leading Edge Sweep on the Cavitating Characteristics of Inducer Pumps

1California Institute of Technology, Mechanical Engineering, Pasadena California, USA
2Osaka University, Engineering Science, Osaka, Japan
3Fluid Machinery Research, Inc., Titusville, New Jersey, USA
4California Institute of Technology, Mechanical Engineering, Pasadena 91125, CA, USA

Revised 10 July 2001

Copyright © 2001 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


It is well known that leading edge sweep has a favorable effect on the cavitation of turbomachines. However, the mechanisms of the improvement have not been made clear. It has been shown that the lift and the drag on a cavitating swept single hydrofoil can be correlated fairly well based on the velocity component normal to the leading edge. In the present paper, such correlations for swept cascades are derived and the results are examined, neglecting the full geometrical effects of the inducer rotor. It is shown that the correlations can simulate the developments of various types of cavitation, including alternate blade cavitation, rotating cavitation, and cavitation surge. This result is based on the observation that the steady cavity length, as well as the developments ofvarious types ofcavitation, is fairly well predicted by the correlation.