Computational Evaluation Method for Inception Flowrate of Unstable Characteristic in Mixed Flow Pumps
To predict unstable characteristic of mixed flow pump, two mixed flow pumps were experimentally and numerically investigated. Calculated characteristics agreed well with experimental ones. It was clarified from the numerical results that stall mechanism was different between two impellers. One was t...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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The Japan Society of Mechanical Engineers
2010-03-01
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| Series: | Journal of Fluid Science and Technology |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jfst/5/2/5_2_98/_pdf/-char/en |
| _version_ | 1819282234551566336 |
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| author | Kiyotaka HIRADATE Hayato SHIMIZU Yuji NAGAI Kouichi IRIE |
| author_facet | Kiyotaka HIRADATE Hayato SHIMIZU Yuji NAGAI Kouichi IRIE |
| author_sort | Kiyotaka HIRADATE |
| collection | DOAJ |
| description | To predict unstable characteristic of mixed flow pump, two mixed flow pumps were experimentally and numerically investigated. Calculated characteristics agreed well with experimental ones. It was clarified from the numerical results that stall mechanism was different between two impellers. One was the blade stall induced by separation on the suction surface of impeller. The other was wall stall induced by separation on the casing wall. Two stall indices were also proposed from the numerical results. The diffusion factor was the index indicating the inception point of the blade stall. The Taylor's pressure coefficient was the index indicating the inception point of the wall stall. The critical values of those indices for the two pumps investigated in this study were derived from the calculation results and agreed well with those values derived from the experimental results. |
| first_indexed | 2024-12-24T01:12:21Z |
| format | Article |
| id | doaj.art-b45602f719c14600b5d84a4814fd3452 |
| institution | Directory Open Access Journal |
| issn | 1880-5558 |
| language | English |
| last_indexed | 2024-12-24T01:12:21Z |
| publishDate | 2010-03-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Journal of Fluid Science and Technology |
| spelling | doaj.art-b45602f719c14600b5d84a4814fd34522022-12-21T17:22:51ZengThe Japan Society of Mechanical EngineersJournal of Fluid Science and Technology1880-55582010-03-01529811010.1299/jfst.5.98jfstComputational Evaluation Method for Inception Flowrate of Unstable Characteristic in Mixed Flow PumpsKiyotaka HIRADATE0Hayato SHIMIZU1Yuji NAGAI2Kouichi IRIE3Mechanical Engineering Research Laboratory, HITACHI, LTD.Mechanical Engineering Research Laboratory, HITACHI, LTD.Hitachi Plant Technologies, Ltd.Hitachi Plant Technologies, Ltd.To predict unstable characteristic of mixed flow pump, two mixed flow pumps were experimentally and numerically investigated. Calculated characteristics agreed well with experimental ones. It was clarified from the numerical results that stall mechanism was different between two impellers. One was the blade stall induced by separation on the suction surface of impeller. The other was wall stall induced by separation on the casing wall. Two stall indices were also proposed from the numerical results. The diffusion factor was the index indicating the inception point of the blade stall. The Taylor's pressure coefficient was the index indicating the inception point of the wall stall. The critical values of those indices for the two pumps investigated in this study were derived from the calculation results and agreed well with those values derived from the experimental results.https://www.jstage.jst.go.jp/article/jfst/5/2/5_2_98/_pdf/-char/enmixed flow pumpunstable characteristicperformance predictiondeceleration rateimpeller stallcfd |
| spellingShingle | Kiyotaka HIRADATE Hayato SHIMIZU Yuji NAGAI Kouichi IRIE Computational Evaluation Method for Inception Flowrate of Unstable Characteristic in Mixed Flow Pumps Journal of Fluid Science and Technology mixed flow pump unstable characteristic performance prediction deceleration rate impeller stall cfd |
| title | Computational Evaluation Method for Inception Flowrate of Unstable Characteristic in Mixed Flow Pumps |
| title_full | Computational Evaluation Method for Inception Flowrate of Unstable Characteristic in Mixed Flow Pumps |
| title_fullStr | Computational Evaluation Method for Inception Flowrate of Unstable Characteristic in Mixed Flow Pumps |
| title_full_unstemmed | Computational Evaluation Method for Inception Flowrate of Unstable Characteristic in Mixed Flow Pumps |
| title_short | Computational Evaluation Method for Inception Flowrate of Unstable Characteristic in Mixed Flow Pumps |
| title_sort | computational evaluation method for inception flowrate of unstable characteristic in mixed flow pumps |
| topic | mixed flow pump unstable characteristic performance prediction deceleration rate impeller stall cfd |
| url | https://www.jstage.jst.go.jp/article/jfst/5/2/5_2_98/_pdf/-char/en |
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