核电轴流式止回阀关闭动态特性研究  

Study on the Closing Dynamic Characteristics of Nuclear Power Axial Flow Check Valve

作　　者：王秋林 王学生[2] 田峰 WANG Qiu-lin;WANG Xue-sheng;TIAN Feng(Shanghai Valve Factory Co.,Ltd.,Shanghai 201814,China;East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]上海阀门厂股份有限公司,上海201814 [2]华东理工大学,上海200237

出　　处：《阀门》2024年第9期1142-1149,共8页Chinese Journal of Valve

摘　　要：核电站给水阀需要具备减小倒灌量、控制水锤效应的特点。本文利用计算流体力学的方法,借助Fluent的动网格技术,对某核电站的快关缓闭轴流式止回阀进行多次结构迭代,并对止回阀从开度100%降至0的整个关闭过程进行数值模拟特性研究,确保最终优化的止回阀在介质参数4.88 MPa、187℃的逆流工况下,阀门处的流通面积在0.3~0.5 s内减小至连接管路流通面积的10%,且最终关阀时间控制在1~4 s范围内。通过多次的结构迭代,最终优化的止回阀结构满足已定的设计要求,并对其关闭特性曲线与水锤效应进行了相应分析。Nuclear power station feedwater valves are required to reduce backflow volume and control water hammer effects.This paper utilizes computational fluid dynamics methods, leveraging dynamic mesh technology, to conduct multiple structural iterations on a quick-closing, slow-closing axial flow check valve of a nuclear power station.The study performs a simulation of the valve closing process from 100% open to fully closed.It ensures that the optimized check valve can reduce the flow area at the valve to 10% of the connecting pipeline's flow area within 0.3 to 0.5 seconds under backflow conditions with medium parameters of 4.88 MPa and 187 ℃,and the final valve closure time is controlled within 1 to 4 seconds.After multiple structural iterations, the optimized check valve meets the design requirements, and its closing characteristic curve and water hammer effect have been analyzed accordingly.

关 键 词：轴流式止回阀 动网格 数值模拟 结构优化 

分 类 号：TL334[核科学技术—核技术及应用]