核主泵过流部件设计及内部流场数值仿真

摘要

According to the Parameters of AP1000, first, the frequency is reduced to 50 Hz to meet the domestic Power Grid,the rotation speed is reduced from 1750r/min to 1450r/min,and the hydraulic mechanism is designed by way of the enforcement swirl and velocity modulus.Then the Moving Reference Frame model and SIMPLEC algorithm are used to simulate the designed hydraulic mechanism at high temperature and high pressure condition, which is contrasted with at normal temperature and high pressure condition.Finally, the curves of Flow - Efficiency and Flow - Head are made separately.The results show that the hydraulic design method is feasible and will provide some useful reference to the research on optimal hydraulic model.%在核主泵变频器优化设计的研究中,根据AP1000相关参数,针对新的主泵系统变频要求,为增强系统运行的稳定性.采用强制漩涡法和速度系数法将设计转速从1750r/min降至1450r/min设计核主泵过流部件,以适应我国50Hz电网需求.利用多重参考系模型、SIMPLEC算法,对所设计的核主泵过流部件高温高压工况进行全流量数值仿真并且对比常温常压工况,绘制出流量一效率,流量一扬程曲线图.仿真结果证明,水力设计方案可行,表明内流部件和工质满足主泵性能要求.