Abstract：In order to analyze inner flow transient performance of an axial flow pump, based on the unsteady incompressible flow governing equations and the RNG k-ε turbulence model, the SIMPLEC method and sliding mesh technique were used to numerically simulate the 3D turbulent flow of the full passage in a vertical axial flow pump within a complete rotating cycle. The interaction between pass flow parts was taken into consideration. The type of pump was 4000ZLQ53.5-6.6JS. The pressure, velocity and vortices distributions on the interaction surface were given under the conditions that blade angle was zero and the discharge was 53.5 m 3/s. The results show respectively the variation of flow field characteristics in the impeller, and full flow passage in one rotating cycle. Numerical simulation results were obtained through comparative analysis on the distribution on the interaction surface. By introducing dynamic performance prediction, doing time average and comparing the results of dynamic performance prediction with test data from a pumping station, the method proves to be credible. It is indicated that the 3D unsteady turbulent simulation is effective for understanding the axial flow pump flow field, as well as the interaction mechanism.
[1]Feltena F,Fautrelle Y,Du Terraila Y,et al.Numerical modelling of electromagnetically-driven turbulent flows using LES methods[J].Applied Mathematical Modelling,2004,28(1):15-27.[2]Majidi K.Numerical study of unsteady flow in a centrifugal pump[J].Journal of Turbomachinery,2005,127(2):363-371.[3]杨敏官,刘栋,贾卫东,等.离心泵叶轮内部三维湍流流动的分析[J].江苏大学学报:自然科学版,2006,27(6):524-527.Yang Minguan,Liu Dong,Jia Weidong,et al.Analysis on turbulent flow in impeller of centrifugal pump[J].Journal of Jiangsu University:Natural Science Edition,2006,27(6):524-527.(in Chinese)[4]Xia Penghui,Liu Shuhong,Wu Yulin,et al.Study on flow field of impeller tip clearance in the double suction pump[C]//Proceedings of the ASME 2005 Fluids Engineering Division Summer Meeting.New York:ASME,2005,FEDSM2005-77409,1513-1518.[5]Chen Hongxun.Research on turbulent flow within the vortex pump[J].Journal of Hydrodynamics,2004,16(6):701-707.[6]Li Yaojun,Wang Fujun.Numerical investigation of performance of an axial-flow pump with inducer[J].Journal of Hydrodynamics,2007,19(6):705-711.[7]陆林广,伍杰,陈阿萍,等.立式轴流泵装置的三维湍流流动数值模拟[J].排灌机械,2007,25(1):29-32.Lu Linguang,Wu Jie,Chen Aping,et al.Numerical simulation of 3D turbulent flow in a vertical axial-flow pump system[J].Drainage and Irrigation Machinery,2007,25(1):29-32.(in Chinese)[8]杨军虎,张炜,王春龙,等.潜水轴流泵全流道三维湍流数值模拟及性能预估[J].排灌机械,2006,24(4):5-9.Yang Junhu,Zhang Wei,Wang Chunlong,et al.Numerical simulation of turbulent flow through full passage of submersible axial pump and performance predictions[J].Drainage and Irrigation Machinery,2006,24(4):5-9.(in Chinese)[9]Farrant T,Tan M,Price W G.A cell boundary element method applied to laminar vortex shedding from circular cylinders[J].Computers and Fluids,2001,30(2):211-236.[10]水利部泵站测试中心.樊口泵站现场测试报告[R].武汉:武汉大学动力与机械学院,2008.
