Measurements of the Flow in Backshroud/Casing Clearance of Precessing Centrifugal Impeller
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 th...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Hindawi Limited
1997-01-01
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| Series: | International Journal of Rotating Machinery |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1155/S1023621X97000249 |
| Summary: | 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. |
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| ISSN: | 1023-621X |