Abstract：In the case of different impeller outlet diameters,the flow field in six centrifugal pumps was simulated by using FLUENT code.The standard k-ε turbulence model and SIMPLEC algorithm were chosen in FLUENT.The simulation was steady and moving reference frame was used to consider rotor-stator interaction.According to the simulation results,the head and shaft power of the model were predicted and the results were in accordance with cutting law,but the prediction efficiency was not constant.The flow analysis indicates that the change of impeller outlet diameter has obvious effects on static pressure and total pressure at impeller outlet and in volute.Also the change of impeller outlet diameter has important impacts on absolute velocity distribution,especially near the cutwater of the volute.When the cutting quantity is greater than 4%,the flow separation at the diffusion section of volute will disappear.
谈明高， 刘厚林， 王勇， 王凯， 董亮. 叶轮外径对离心泵内流影响的CFD分析[J]. 排灌机械工程学报, 2009, 27(5): 314-318.
Tan Minggao,Liu Houlin,Wang Yong,Wang Kai,Dong Liang. CFD analysis on effects of impeller outlet diameter on flow field in centrifugal pump. Journal of Drainage and Irrigation Machinery Engin, 2009, 27(5): 314-318.
[1]Barrio R,Blanco E,Parrondo J,et al.The effect of impeller cut back on the fluid dynamic pulsations and load at the blade passing fequency in a centrifugal pump[J].Journal of Fluid Engineering,2008,130(11):111102-1-111102-11.[2]Qin W,Tsukamoto H.Theoretical study of pressure fluctuations downstream of a diffuser pump impeller-part 2:effects of volute,flowrate and radial gap[J].Journal of Fluid Engineering,1997,119(3):653-658.[3]杨任,李文广,蔡永雄,等.不同出口角离心油泵叶轮切割性能实验[J].排灌机械,2005,23(3):27-31.Yang Ren,Li Wenguang,Cai Yongxiong,et al.Performance of experiments impellers trimmed with different outlet angle of blade for a centrifugal oil pump while pumping water[J].Drainage and Irrigation Machinery,2005,23(3):27-31.(in Chinese)[4]González J,Parrondo J,Santolaria C,et al.Steady and unsteady radial forces for a centrifugal pump with impeller to tongue gap variation[J].Journal of Fluids Engineering,2006,128(3):454-462.[5]González J,Santolaria C.Unsteady flow structure and global variables in a centrifugal pump[J].Journal of Fluids Engineering,2006,128(5):937-946.[6]Majidi K.Numerical study of unsteady flow in a centrifugal pump[J].Journal of Turbomachinery,2005,127(2):363-371.[7]朱红耕,袁寿其,刘厚林,等.进水流道对立式混流泵装置能量特性的影响[J].江苏大学学报:自然科学版,2007,28(1):46-50.Zhu Honggeng,Yuan Shouqi,Liu Houlin,et al.Influence of suction box on erengy characteristics of vertical mixed flow pumping systems[J].Journal of Jiangsu University:Natural Science Edition,2007,28(1):46-50.(in Chinese)[8]刘宜,张文军,杜杰.离心泵内部空化流动的数值预测[J].排灌机械,2008,26(3),19-21.Liu Yi,Zhang Wenjun,Du Jie.Numerical prediction of cavitation flow in centrifugal pump[J].Drainage and Irrigation Machinery,2008,26(3):19-21.(in Chinese)[9]向清江,袁寿其,何培杰,等.液汽射流泵内部流场的数值计算[J].江苏大学学报:自然科学版,2008,29(3):231-235.Xian Qingjiang,Yuan Shouqi,He Peijie,et al.Numerical simulation of liquid jet gas pump[J].Journal of Jiangsu University:Natural Science Edition,2008,29(3):231-235.(in Chinese)[10]关醒凡.现代泵技术手册[M].北京:宇航出版社,1995.[11]谈明高.离心泵能量性能预测的研究[D].镇江:江苏大学,2008.
