Unsteady Stress of 4-Bladed Inducer Blades and the Effect of Inlet Flow Distortion
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- FUJII Akira
- Osaka University, Graduate School of Engineering Science, Division of Mechanical Science
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- AZUMA Seiji
- Osaka University, Graduate School of Engineering Science, Division of Mechanical Science
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- YOSHIDA Yoshiki
- Osaka University, Graduate School of Engineering Science, Division of Mechanical Science
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- TSUJIMOTO Yoshinobu
- Osaka University, Graduate School of Engineering Science, Division of Mechanical Science
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- LAFFITTE Stéphane
- SNECMA, Division Moteurs-fusees, Direction Grouse Propulsion a Liquides
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Unsteady stress-of 4-bladed inducer blades was measured at the blade root near the leading edge with and without inlet flow distortion. The following results were obtained: (1) Without the inlet flow distortion, the mean stress of the blade with shorter cavity is smaller than that with longer cavity under the alternate blade cavitation at intermediate cavitation number. At lower cavitation number, the stress fluctuation occurs caused by the cavitation instability such as rotating cavitation/cavitation surge, which is one of the major causes of stress fluctuations in inducers. (2) The magnitude of the blade stress fluctuation due to the interaction with the inlet flow distortion basically decreases as we decrease cavitation number. With inlet flow distortion, the occurrence ranges of alternate blade cavitation and cavitation instabilities shift toward lower cavitation number. Under the alternate blade cavitation, the fluctuation of longer cavity causes the stress fluctuation of the adjacent blade with shorter cavity. The stress fluctuations caused by the rotating cavitation and acvitation surge are nearly the same level as those in case without inlet flow distortion.
収録刊行物
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- JSME International Journal Series B Fluids and Thermal Engineering
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JSME International Journal Series B Fluids and Thermal Engineering 45 (1), 47-54, 2002
一般社団法人 日本機械学会
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詳細情報 詳細情報について
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- CRID
- 1390282679652984064
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- NII論文ID
- 110003479007
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- NII書誌ID
- AA10888815
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- ISSN
- 13475371
- 13408054
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- NDL書誌ID
- 6072403
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
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