International Journal of Rotating Machinery

International Journal of Rotating Machinery / 1997 / Article

Open Access

Volume 3 |Article ID 172630 |

Yoshiki Yoshida, Yoshinobu Tsujimoto, Hideo Ohashi, Akira Saito, Shin Ishizaki, "Measurements of the Flow in Backshroud/Casing Clearance of Precessing Centrifugal Impeller", International Journal of Rotating Machinery, vol. 3, Article ID 172630, 10 pages, 1997.

Measurements of the Flow in Backshroud/Casing Clearance of Precessing Centrifugal Impeller

Received06 Mar 1997
Revised24 Mar 1997


Detailed flow measurements have been made to clarify the unsteady flow in the backshroud/ casing clearance of a precessing centrifugal impeller. The unsteady pressure was integrated to obtain the fluid force moment on the precessing impeller shroud for various precessing frequencies. It was shown that the fluid force moment can become rotordynamically destabilizing for small forward precessing motion as originally found by Ohashi et al. The effects of leakage flow in the backshroud/casing clearance and a gap between impeller side plate and casing at the impeller outlet are clearly shown, and the discussions are also made based on the unsteady velocity and pressure measurements.

Copyright © 1997 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.

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