1999 Fiscal Year Final Research Report Summary
Theoretical Prediction of Pressure Fluctuations in a Diffuser Pump based on Rotor-Stator Interaction Analysis
| Project/Area Number |
09450081
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Fluid engineering
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| Research Institution | KYUSHU INSTITUTE OF TECHNOLOGY |
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Principal Investigator |
TSUKAMOTO Hiroshi Kyushu Institute of Technology, Engineering, Professor, 工学部, 教授 (50117305)
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| Co-Investigator(Kenkyū-buntansha) |
UNO Mitsuo Kyushu Kyoritsu University, Engineering, Associate Professor, 工学部, 講師 (60142353)
MIYAZAKI Koji Kyushu Institute of Technology, Engineering, Associate Professor, 工学部, 講師 (70315159)
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| Project Period (FY) |
1997 – 1999
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| Keywords | Diffuser Pump / Pressure Fluctuation / Rotor-Stator Interaction / Unsteady Flow / Rotor-Stator Flow Analysis / Viscous Flow Analysis / CFD / Unsteady hydraulic Force |
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| Research Abstract |
Two-dimensional and three-dimensional, unsteady Reynolds-averaged navier-Stokes (RANS) equations with standard k-e turbulence models were solved within a whole stage of a diffuser pump to investigate pressure fluctuations due to interaction between impeller and diffuser vanes. The arbitrary sliding mesh was employed for the full solution of transient flow due to the interaction between components without approximating the blade count ratio of impeller to diffuser. In addition, two-dimensional vorticity method was applied to the whole stage of diffuser pump. The unsteady numerical results were compared with ones calculated by singularity method and experimental data. As a result of the present study, the Navier-Stokes code with the k-e model as well as vorticity method is found to be capable of predicting pressure fluctuations in the diffuser. Further, extensive numerical studies identified sources contributing to the pressure fluctuations in the diffuser, and help understand the mechanism of impeller-diffuser interactions in the diffuser pump.
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