Abstract：Ansys-CFX software was adopted to simulate the unsteady flow field at different operating conditions in an entire centrifugal pump whose impeller was designed with and without splitter blades. To analyze the influence of design parameters of splitter blades on the unsteady flow field of the pump, the splitter blades were designed to have different inlet diameters and circumferential positions. The results show that when splitter blades are added, the pump head increases by 2%-12% and the pressure fluctuations at the impeller inlet, volute outlet and the interface of impeller and volute are reduced, thus the splitter blades have improved the “jetwake” flow structure. The influence of design parameters of splitter blades on the unsteady flow field in the pump is variable. When the inlet diameter of splitter blades is 106 mm and the blades are deviated to the suction side of the full length blades by 5° , the head is the highest and the pressure fluctuations are the lowest.
［1］Glc M, Usta N, Pancar Y. Effects of splitter blades on deep well pumpperformance［J］. Journal of Energy Resources Technology, 2007, 129: 169-176.［2］Kergourlay G, Younsi M, Bakir F, et al. Influence of splitter blades on the flow field ofa centrifugal pump: Testanalysis comparison［J］. International Journal of RotatingMachinery, 2007: 85024.［3］袁寿其,何有世,袁建平,等.带分流叶片的离心泵叶轮内部流场的PIV测量与数值模拟［J］. 机械工程学报, 2006, 42(5): 60-63.Yuan Shouqi, He Youshi, Yuan Jianping, et al. PIV measurements and numerical simulation offlow in centrifugal pump impellers with splitter vanes［J］. Chinese Journal of Mechanical Engineering, 2006, 42(5): 60-63. (in Chinese)［4］陈松山,周正富,葛强,等.长短叶片离心泵正交试验研究［J］.扬州大学学报:自然科学版, 2005, 8(4): 45-48.Chen Songshan, Zhou Zhengfu, Ge Qiang, et al. Orthogonal experimental study oncentrifugal pump with deviated splitter vanes［J］. Journal of Yangzhou University:NaturalScience Edition, 2005, 8(4): 45-48. (in Chinese)［5］朱祖超.低比转速高速离心泵的理论和设计应用［M］. 北京:机械工业出版社,2008.［6］耿少娟,聂超群,黄伟光,等.不同叶轮形式下离心泵整机非定常流场的数值研究［J］.机械工程学报, 2006, 42(5): 27-31.Geng Shaojuan, Nie Chaoqun, Huang Weiguang, et al. Numerical study of unsteady flow incentrifugal pump with different type of impellers［J］. Chinese Journal of MechanicalEngineering, 2006, 42(5): 27-31. (in Chinese)［7］张金凤.带分流叶片离心泵全流场数值预报和设计方法研究［D］.镇江:江苏大学流体机械工程技术研究中心, 2007.［8］祝磊,袁寿其,袁建平,等.阶梯隔舌对离心泵压力脉动的径向力影响的数值预报［J］.农业机械学报, 2010, 41 (9): 21-26.Zhu Lei, Yuan Shouqi, Yuan Jianping, et al. Numerical simulation on pressure fluctuations andradial hydraulic forces in centrifugal pump with steptongue［J］. Transactions of theChinese Society for Agricultural Machinery, 2010, 41 (9): 21-26. (in Chinese)［9］Kitano Majidi. Numerical study of unsteady flow in a centrifugal pump［J］. Journal ofTurbomachinery, 2005, 127: 363-371.［10］朱荣生,胡自强,付强.双叶片泵内压力脉动的数值模拟［J］. 农业工程学报, 2010,26(6): 129-134.Zhu Rongsheng, Hu Ziqiang, Fu Qiang. Numerical simulation of pressure fluctuation in doubleblade pump［J］. Transactions of the CSAE, 2010, 26(6): 129-134. (in Chinese)
