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...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
1997-01-01
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| Series: | International Journal of Rotating Machinery |
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| Online Access: | http://dx.doi.org/10.1155/S1023621X97000249 |
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| _version_ | 1832568243219333120 |
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| author | Yoshiki Yoshida Yoshinobu Tsujimoto Hideo Ohashi Akira Saito Shin Ishizaki |
| author_facet | Yoshiki Yoshida Yoshinobu Tsujimoto Hideo Ohashi Akira Saito Shin Ishizaki |
| author_sort | Yoshiki Yoshida |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-ba68254e66144997bd1f20218d1c3baa |
| institution | Kabale University |
| issn | 1023-621X |
| language | English |
| publishDate | 1997-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Rotating Machinery |
| spelling | doaj-art-ba68254e66144997bd1f20218d1c3baa2025-02-03T00:59:29ZengWileyInternational Journal of Rotating Machinery1023-621X1997-01-013425926810.1155/S1023621X97000249Measurements of the Flow in Backshroud/Casing Clearance of Precessing Centrifugal ImpellerYoshiki Yoshida0Yoshinobu Tsujimoto1Hideo Ohashi2Akira Saito3Shin Ishizaki4Engineering Science, Osaka University, Machikaneyama 1-3, Toyonaka, Osaka 560, JapanEngineering Science, Osaka University, Machikaneyama 1-3, Toyonaka, Osaka 560, JapanMechanical Engineering, Kogakuin University, Nishishinjuku 1-24-2, Shinjuku, Tokyo 163-91, JapanEngineering Science, Osaka University, Machikaneyama 1-3, Toyonaka, Osaka 560, JapanEngineering Science, Osaka University, Machikaneyama 1-3, Toyonaka, Osaka 560, JapanDetailed 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.http://dx.doi.org/10.1155/S1023621X97000249Precessing motionCentrifugal pumpRotordynamic momentUnsteady flowLeakage flow. |
| spellingShingle | 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 Precessing motion Centrifugal pump Rotordynamic moment Unsteady flow Leakage flow. |
| title | Measurements of the Flow in Backshroud/Casing
Clearance of Precessing Centrifugal Impeller |
| title_full | Measurements of the Flow in Backshroud/Casing
Clearance of Precessing Centrifugal Impeller |
| title_fullStr | Measurements of the Flow in Backshroud/Casing
Clearance of Precessing Centrifugal Impeller |
| title_full_unstemmed | Measurements of the Flow in Backshroud/Casing
Clearance of Precessing Centrifugal Impeller |
| title_short | Measurements of the Flow in Backshroud/Casing
Clearance of Precessing Centrifugal Impeller |
| title_sort | measurements of the flow in backshroud casing clearance of precessing centrifugal impeller |
| topic | Precessing motion Centrifugal pump Rotordynamic moment Unsteady flow Leakage flow. |
| url | http://dx.doi.org/10.1155/S1023621X97000249 |
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