利用ANSYS CFX11.0软件，采用标准k-ε湍流模式封闭雷诺应力项，使用匀相多相流模型和Zwart-Gerber-Belamri空化模型对轴流泵模型的汽蚀特性进行三维定常数值模拟,计算得到的流量-必需汽蚀余量（net positive suction head,NPSH_r）曲线与试验结果趋势一致.另外，分析了工况和NPSH对轴流泵汽蚀特性以及泵内汽蚀形态的影响.

Using ANSYS CFX11.0, this paper conducts full three-dimensional numerical simulations of the cavitation behavior of an axial pump with turbulence model of standard k-ε, homogeneous multiphase model, and Zwart-Gerber-Belamri cavitation model. The head performances of cavitation of an axial pump are obtained. Simulated performance of the axial pump agrees with the measured data. Location of cavitation and evolution of cavity in the axial pump and the relation between the cavitation behavior and performance of axial pump under the different operations are analyzed.