旋启式止回阀关闭过程瞬态流固耦合特性研究  

Transient fluid-structure interaction characteristics of the swing check valve closing process

作　　者：赵帅[1,3] 盛丽媛 陆程 朱荣生 陈一鸣[1,3] 付强 ZHAO Shuai;SHENG Liyuan;LU Cheng;ZHU Rongsheng;CHEN Yiming;FU Qiang(National Research Center of Pumps,Jiangsu University,Zhenjiang 212013,China;China Nuclear Power Engineering Co.Ltd.,Beijing 100840,China;Joint Laboratory of Intelligent Diagnosis Operation and Maintenance of Nuclear Power Pumps and Devices,Zhenjiang 212013,China)

机构地区：[1]江苏大学国家水泵及系统工程技术研究中心,江苏镇江212013 [2]中国核电工程有限公司,北京100840 [3]核电泵及装置智能诊断运维联合实验室,江苏镇江212013

出　　处：《机电工程》2023年第10期1502-1510,共9页Journal of Mechanical & Electrical Engineering

基　　金：国家自然科学基金联合基金资助项目(U20A20292)。

摘　　要：某核电厂重要厂用水系统止回阀的内部流动特性不明,缺少相应的应力应变分析,同时也较难对其进行试验研究。为此,采用动网格方法,建立了流固耦合计算模型,并进行了仿真计算,对核电厂重要厂用水系统旋启式止回阀关闭过程的流固耦合特性进行了研究。首先,针对某核电厂止回阀原型,建立了阀门及水体模型,并进行了网格无关性验证,确定了其最终的计算模型;然后,使用profile编写了阀板运动控制规则,设置了动网格模型,利用ANSYS单向流固耦合方法,设置了其交界面与约束条件,对止回阀瞬态关闭过程进行了仿真计算;最后,对关阀过程中不同开度的流场速度压力分布和结构场应力变形变化进行了分析。研究结果表明:在止回阀的关闭过程中,阀内流场最大速度在关闭初期为17.87 m/s,并逐步降低至0 m/s;止回阀的最大等效应力和最大变形量分别出现在转轴与阀体连接处以及阀板的最下部,分别为1.5474×108 Pa和4.74 mm,并随开度减小而增大。依据计算结果得到了该止回阀关闭工况的流场变化与阀门应力、变形响应特性,提高了设备运行的可靠性,可以为设备的优化设计提供参考。The internal flow characteristics of the check valve in the important service water system of a nuclear power plant are not understood,and the corresponding stress-strain analysis is lacking.At the same time,it is difficult to carry out experimental research.Therefore,the dynamic grid method was used to establish the fluid-solid coupling calculation model,and the simulation calculation was carried out,and the fluid-solid coupling characteristics of the swing check valve in the important service water system of nuclear power plant were studied.Firstly,based on the prototype of check valve of a nuclear power plant,the valve and water body model were established,and the final calculation model was determined after using the grid independence test.Then,the valve plate motion control rules were written using profile,the dynamic grid model was set up,and the interface and constraint conditions were set up by using ANSYS unidirectional fluid-structure coupling method to simulate the transient closing process of check valve.Finally,the velocity and pressure distribution of flow field and the stress and deformation changes of structure field with different opening degrees during valve closing were analyzed.The experimental results show that during the closing process,the maximum flow velocity of the flow field in the check valve occurring at the beginning of closing is 17.87 m/s and it gradually decreases to 0 m/s.The maximum equivalent force and maximum deformation of the check valve respectively appear at the connection between the shaft and the valve body and the lowest part of the valve plate,and the final maximum equivalent force and deformation are respectively 1.5474×108 Pa and 4.74 mm,which increase as the open degree decrease.The calculation results obtain the flow field change characteristics and the stress and deformation response characteristics of the check valve closing condition,improve the reliability of equipment operation,which can provide a reference for the optimal design of the equipment.

关 键 词：液压控制阀 旋启式止回阀 内部流动特性 应力应变分析 流固耦合 动网格方法 结构响应特征 

分 类 号：TH134[机械工程—机械制造及自动化] TM623[电气工程—电力系统及自动化]