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| Effect of oblique angle of blade trailing edge on pressure fluctuation in centrifugal pump |
| (Key Laboratory of ThermoFluid Science and Engineering, Ministry of Education, Xi′an Jiaotong University, Xi′an, Shaanxi 710049, China) |
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Abstract Two impellers, in which the blade trailing edge is with different oblique angles but the blade angle profile remains unchanged, were designed for a centrifugal pump to study the pressure fluctuation features caused from the impellervolute interaction. The unsteady, threedimensional turbulent flow in the pump was simulated by using the SST turbulence model, SIMPLEC algorithm and sliding mesh technique in this paper. Then the performance and pressure fluctuations in centrifugal pumps with those impellers were obtained. It was demonstrated that the pump keeps a relative higher efficiency in an extended flow rate range with decreasing oblique angle; additionally, the pump heads are close to each other for the two impellers at the partloading and design conditions, however, the heads increase at high flow rates. The periodic features in pressure fluctuation are the same for the two impellers, however, the amplitude of the fluctuation and highfrequency components are reduced in the volute and near its tongue. These results can provide a useful reference for the design of centrifugal pump impeller.
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Received: 01 November 2012
Published: 31 May 2013
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| ［1］González J, Fernández J, Blanco E, et al. Numerical simulation of the dynamic effects due to impeller volute interaction in a centrifugal pump\[J\].Transactions of the ASME, 2002,124(2): 348-355.［2］Spence R, Amaral T J. A CFD parametric study of geometrical variations on the pressure pulsations and performance characteristics of a centrifugal pump\[J\]. Computers & Fluids, 2009, 38(6): 1243-1257.［3］Yuan Shouqi, Yang Jun, Yuan Jianping, et al.Experiment investigation on the flowinduced noise under variable condition for centrifugal pumps\[J\].Chinese Journal of Mechanical Engineering, 2012,25(3): 456-462.［4］Barrio R, Parrondo J, Blanco E. Numerical analysis of the unsteady flow in the near tongue region in a volute type centrifugal pump for different operating points\[J\].Computers & Fluids,2010, 39(5): 859-870.［5］Gonzlez J, Parrondo J, Santolaria C,et al. Steady and unsteady radial forces for a centrifugal pump with impeller to tongue gap variation\[J\].Transactions of the ASME, 2006,128(3): 454-462.［6］Gonzlez J, Santolaria C, Parrondo J,et al .Unsteady radial forces on the impeller of a centrifugal pump with radial gap variation\[C\]//Proceedings of the 4th ASME/JSME Joint Fluids Engineering Conference,USA:\[s.n.\],2003: 1173-1181.［7］祝磊,袁寿其,袁建平,等.阶梯隔舌对离心泵压力脉动和径向力影响的数值模拟\[J\].农业机械学报,2010,41(S1): 21-26.Zhu Lei, Yuan Shouqi, Yuan Jianping,et al. Numerical simulation on pressure fluctuations and radial hydraulic forces in centrifugal pump with step tongue\[J\]. Transactions of the Chinese Society for Agricultural Machinery,2010,41(S1): 21-26.(in Chinese)［8］祝磊,袁寿其,袁建平,等.不同型式隔舌离心泵动静干涉作用的数值模拟\[J\].农业工程学报，2011,27（10）：50-55.Zhu Lei,Yuan Shouqi,Yuan Jianping,et al.Numerical simulation for rotorstator interaction of centrifugal pump with different tongues\[J\].Transactions of the CSAE,2011,27(10):50-55.(in Chinese)［9］周岭,施卫东,陆伟刚,等.叶轮进口边位置对深井离心泵水力性能的影响\[J\].农业机械学报,2012,43(3):78-82.Zhou Ling, Shi Weidong, Lu Weigang,et al.Hydraulic performance effect of impeller inlet edge position on deepwell centrifugal pump\[J\].Transactions of the Chinese Society for Agricultural Machinery, 2012,43(3),78-82.(in Chinese)［10］Liu Houlin, Wang Yong, Yuan Shouqi,et al.Effects of blade number on characteristics of centrifugal pumps\[J\].Chinese Journal of Mechanical Engineering, 2010, 23(6):742-747.［11］王勇,刘厚林,袁寿其,等.叶片数对离心泵空化诱导振动噪声的影响\[J\].哈尔滨工程大学,2012,33（11）：1405-1409.Wang Yong,Liu Houlin, Yuan Shouqi,et al.Effects of blade number on cavitationinduced vibration and noise of centrifugal pump\[J\].Journal of Harbin Engineering University,2012,33(11):1405-1409.(in Chinese)［12］田辉,郭涛,孙秀玲,等.离心泵内部动静干涉作用的数值模拟\[J\].农业机械学报，2009,40(8):92-95.Tian Hui,Guo Tao,Sun Xiulin，et al.Numerical simulation of unsteady flow in a centrifugal pump\[J\].Transactions of the Chinese Society for Agricultural Machinery,2009,40(8):92-95.(in Chinese) |
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