瞬态过程中闸阀的流场温场及形变分析

Flow and Temperature Fields, and Deformation Analysis of the Gate Valve in the Transient Condition

闸阀是反应堆一回路系统的重要部件,瞬态过程中流体温场的变化会影响阀体的温场变化,进而影响阀门的密封情况。本文使用计算流体动力学方法对包含部分管路系统的闸阀进行瞬态三维流固耦合分析。通过对闸阀内流体的流场和温场的模拟计算,获得了瞬态过程中闸阀阀体温场的变化以及由于温场变化导致的热变形和热应力;在此基础上对不同边界条件和不同阀门结构进行了计算分析和评价,其结果可供闸阀设计参考。

The gate valve is an important part of the reactor primary loop. The variation of fluid temperature during the transient process will cause rapid changes in the temperature filed of the gate valve and affect the sealing of the gate valve. In this paper, the computational fluid dynamic method and fluid-structure coupling method are used to analyze the flow field and temperature field of the gate valve including the primary pipe system during the transient process. Through numerical simulation, the evolution laws of temperat ure in the gate valve during the transient process as well as the thermal deformation and thermal stress are obtained in details. The results can be referenced in the safety analysis of the gate valve.