主冷却剂泵三维流场数值模拟与分析

摘要

为深入理解和分析高温高压工况条件下某主冷却剂泵性能,采用计算流体力学方法(CFD)对其内部复杂的三维流场进行了数值模拟与分析.建立了某主冷却剂泵各部件几何模型,并对其进行网格划分.通过求解RANS方程对主冷却剂泵内部三维流场进行数值求解,湍流流动采用SST模型进行模拟.计算得到该泵在高、低设计转速时的扬程、功率和效率等性能参数.计算结果与试验数据相比较,误差在4%以内.分析表明采用CFD方法模拟结构复杂的主冷却剂泵内部流动是可行的.%Computational fluid dynamics (CFD) was used to analyze the performance of a primary coolant pump.The pump was simulated to determine inner three-dimensional flow when working at high temperature and high pressure. The first step was to establish a geometric model of the pump, and for this a hexahedron structural mesh and tetrahedron non-structural mesh were used to mesh it. The three-dimensional flow of the primary coolant pump was solved using Reynolds-averaged Navier-Stokes (RANS) equations. The shear-stress transport (SST) model was adopted to simulate turbulent flow. Parameters such as power, lifting capacity and efficiency at high and low design rotating speeds were obtained. A comparison between the results of our calculations and experimental data shows that the error was less than 4% , proving it is feasible to simulate the complex flow in a primary coolant pump by the CFD method.