高温高压核电闸阀流固热耦合分析

Fluid-solid-heat Coupling Analysis for High-temperature and High-pressure Nuclear Power Gate Valve

以高温高压核电闸阀为研究对象,分析了流固热三场耦合的原理。数值模拟后得到流体的压力、速度和温度分布,以及闸阀的变形和应力分布。通过对闸阀施加载荷,分析压力和温度对闸阀性能的影响。模拟结果显示,流体在阀座部位产生压力波动,并在底部产生涡流,流体压力能转换成热能。在不限制闸阀整体自由变形的情况下,因热产生的变形较大,因流体压力产生的应力较大,热变形能减小闸阀因流体压力作用而产生的应力。

A high-temperature and high-pressure nuclear power gate valve was studied, and three field coupling principle of flu- id-solid-heat was analysed. Distribution of fluid pressure, velocity, temperature, valve deformation and stress were obtained by numerical simulation. The effect of fluid pressure and temperature upon the valve was analysed by loaded them on it. Simulation results show that the pressure of fluid fluctuates and eddy current generates in the seat area, the pressure energy of fluid transforms into heat energy. When the whole free-form deformation of the valve is unrestricted, heat generates larger deformation and fluid pressure generates greater stress, thermal deformation reduces the stress of the valve under fluid pressure.