Abstract：Abstract：The flow field in an axial-flow pump at different inlet pressure conditions including cavitating and non-cavitating conditions was simulated by using the computational fluid dynamics(CFD)approach based on theory of bubble dynamics and steam-liquid two-phase flow．The velocity field and pressure
distribution were analysed during cavitation progress and the pump characteristics were predicted．The results show that under the non—cavitating condition，the pump head-flow relationship is well predicted with an inaccuracy within 2％．While under the cavitating condition。the cavitation occurring and develo-ping processes are captured successfully by CFD simulation．The cavitation directly affects the pressure distribution on impeller blade surfaces，and also results in change of the pump head and power eharacteristics．Under the cavitation condition，the cavitation area can be found at the leading edge of the guidevane suction sides．Similarity of the cavitation distribution are found among the different impeller passages．But significant differences of the cavitation distribution are revealed among the different guide vanepassages．which is one of the primary factors that result in unstable operation of an axial-flow pump．
杨正军，王福军，刘竹青，张志民 . 基于CFD的轴流泵空化特性预测[J]. 排灌机械工程学报, 2011, 29(1): 11-15.
Yang Zhengjun，Wang Fujun，Liu Zhuqing，Zhang Zhimin . Prediction of cavitation performance of axial—flow pump based on CFD. Journal of Drainage and Irrigation Machinery Engin, 2011, 29(1): 11-15.
［1］王福军, 黎耀军, 王文娥, 等. 水泵CFD应用中的若干问题与思考［J］. 排灌机械,2005, 23(5): 1-10.Wang Fujun, Li Yaojun, Wang Wen′e, et al. Analysis on CFD application in water pumps［J］. Drainage and Irrigation Machinery, 2005, 23(5): 1-10. (in Chinese)［2］王正伟, 沈建华, 方勇耕, 等. 轴流式水轮机内流场整体三维数值解析［J］. 浙江水利水电专科学校学报, 2005, 17(1): 33-35.Wang Zhengwei, Shen Jianhua, Fang Yonggeng, et al. Three dimensional numerical analysis of intemal flow field of axial flow turbine［J］. Journal of Zhejiang Water Conservancy and Hydropower College, 2005, 17(1): 33-35. (in Chinese)［3］卢 池, 陈次昌, 杨昌明, 等. 低比转速离心泵内部流场的数值模拟［J］. 排灌机械, 2005, 23(6): 6-9.Lu Chi, Chen Cichang, Yang Changming, et al. Numerical simulation of flow field in lowspecificspeed centrifugal pump［J］. Drainage and Irrigation Machinery, 2005, 23(6): 6-9. (in Chinese)［4］Coutier D O, Pouffary B, Reboud J L, et al. Cavitation performance of a centrifugal pump: numerical and experimental investigations ［C］∥Proceedings of the 21st IAHR Symposium on Hydraulic Machinery and Systems. Lausanne: ［s.n.］, 2002.［5］Youcef A B, Farhat M, Jeam L K, et al. Experimental and numerical cavitation flow analysis of an industrial inducer［C］∥Proceedings of the 22nd IAHR Symposium on Hydraulic Machinery and Systems. Stockholm, Sweden: ［s.n.］, 2004.［6］Balint D, Resiga R, Muntean S, et al. Numerical simulation and analysis of twophase cavitating flow in Kaplan turbines［C］∥Proceedings of the 23rd IAHR Symposium on Hydraulic Machinery and Systems. Yokohama: ［s.n.］, 2006.［7］龙新平, 程 茜, 韩 宁, 等. 射流泵空化流动的数值模拟［J］. 排灌机械工程学报, 2010, 28(1): 7-11,17.Long Xinping, Cheng Qian, Han Ning, et al. Numerical simulation on cavitating flow within jet pump［J］. Journal of Drainage and Irrigation Machinery Engineering, 2010, 28(1): 7-11,17. (in Chinese)［8］Imene M, Farid B, Robert R. Comparison of computational results obtained from a homogeneous cavitation model with experimental investigation of three inducers ［J］. Journal of Fluids Engineering, 2006, 128(11): 1308-1323.［9］Gabriel D C, Monica S L, Thi C V. Experimental study and numerical simulation of the FLINDT draft tube rotating vortex ［J］. Journal of Fluids Engineering, 2007, 129(2): 146-158.［10］Plesset M S. The dynamics of cavitation bubbles ［J］. Journal of Applied Mechanics, 1949, 16:228-231.［11］Senocak I,Shyy W. Numerical simulation of turbulent flows with sheet cavitation［C］∥Proceedings of the 4th International Symposium on Cavitation. Kpasadena, CA: ［s.n.］, 2001.