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| Computation of leakage flow in centrifugal pumps and its effects on rotor′s vibration |
| Jiang Qinglei， Dai Weiping， Wu Dazhuan， Wang Leqin |
| （Institute of Chemical Machinery Engineering， Zhejiang University， Hangzhou， Zhejiang 310027， China） |
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Abstract To study how the leakage flow affect the vibration characteristics of rotors in centrifugal pump, the leakage flow channel was modeled and then verified by comparing numerical computing results with experimental data obtained from RFTF facility, which was established in California Institute of Technology. Rotors system was established based on finite element method and coupled with leakage flow channel model by transferring data between two domains, then response of rotors was obtained. The results show that stability and stiffness of rotor system are increased by considering the influence of leakage flow on rotors. The fluid-structure interaction approach presented here is useful to directly study influence of leakage flow channel parameters on vibration characteristics of rotors without considering fluid-induced forces and the research results can be used to enhance stability of rotors, especially those in multi-stage pumps.
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Received: 03 December 2009
Published: 30 May 2010
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| ［1］Adkins D R, Brennen C E. Analyses of hydrodynamic radial forces on centrifugal pump impeller［J］. Journal of Fluids Engineering, 1988, 110(1): 20-28.［2］黄义刚,朱荣生,陈松,等. 泵振动的原因及其消除措施［J］. 排灌机械, 2009, 27(6): 56-59.Huang Yigang, Zhu Rongsheng, Chen Song, et al. Numerical analysis of radial force in double-suction centrifugal pumps［J］. Drainage and Irrigation Machinery, 2009,27(6): 56-59. (in Chinese).［3］Robert V U, Brennen C E. Experimental measurements of rotordynamic forces caused by front shroud pump leakage［J］. Journal of Fluids Engineering, 1999, 121（3）:633-637.［4］Childs D W. Fluid-structure interaction forces at pump-impeller-shroud surfaces for axial vibration analysis［J］. Journal of Vibration and Acoustics,1991, 113(1): 108-115.［5］Guinzburg A, Brennen C E, Acosta A J, et al. Experimental results for the rotordynamic characteristics of leakage flows in centrifugal pumps［J］. Journal of Fluids Engineering, 1994, 116(1): 110-115.［6］Yun Hsu, Brennen C E. Effect of swirl on rotordynamic forces caused by front shroud pump leakage［J］. Journal of Fluids Engineering, 2002, 124(4): 1005-1010.［7］Brennen C E, Acosta A J. Fluid-induced rotordynamic forces and instabilities［J］. Structural Control and Health Monitoring, 2006, 13(1):10-26.［8］Takayuki S, Romain P, Hironori H, et al. Measurements of rotordynamic forces on an artificial heart pump impeller［J］. Journal of Fluids Engineering, 2007, 129(11): 1422-1427.［9］郑林庆. 摩擦学原理［M］. 北京：高等教育出版社，1994: 13-18. |
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