中文摘要：

基于N-S方程和标准κ-ε模型对出口等速度环量的轴流式模型泵在不同工况下进行了全流道数值模拟,给出了叶片表面相对速度和压力的分布规律,并将叶轮出口处速度分量计算结果和球形五孔探针测量结果进行比较。分析结果表明：叶片表面的相对速度沿径向逐渐增大,流动分布规律符合圆柱层无关性假设;叶片发生汽蚀的危险区域约位于吸力面外缘进口边到出口边的1/4位置;最优工况下叶轮出口处流场呈螺旋形向外运动趋势,出口旋转动能占出口总动能的34%左右;速度环量测量值从轮毂至轮缘逐渐减小,设计中应适当减小轮毂处圆周分量值,增加轮缘处圆周分量值。研究结果揭示了叶轮表面和出口流动规律,为轴流泵优化设计提供了理论和实际应用参考。

英文摘要：

Based on N-S equations and standard k ？ e model,the designed axial-flow pump of the constant circulation was simulated through full passage in third situation.The relative velocity and the pressure distribution of the blade surfaces were given and the velocity components measured by five-hole probe at the outlet of impeller were compared with the calculated values.The results show that the relative velocity increased in the radial direction and the interior flow law is consistent to the hypothesis.The cavitation region is located at suction side about 1/4 to the length of external blade side from the inlet to the outlet.At the efficiency point,the flow field at the outlet of impeller is a spiral movement and the rotary kinetic energy occupy 34%of the outlet kinetic energy.The velocity circulation decrease from the hub to the flange,the more circular velocity at the flange and the less at the hub are needed in design.The research data reveals the flow law at the blade and the outlet of the axial-flow pump and can be referenced by the optimization design of axial-flow pump.