钠冷快堆钠-空气热交换器风阀流热固耦合研究  

Study on Fluid-Thermal-Solid Coupling of Damper of Sodium to Air Heat Exchanger in Sodium-Cooled Fast Reactor

作　　者：高博[1] 张宇景 孙宝平 刘盛 Gao Bo;Zhang Yujing;Sun Baoping;Liu Sheng(School of Mechanical Engineering,Lanzhou Jiaotong University,Lanzhou,730070,China;Lanzhou Changxin Electric Equipment Co.,Ltd.,Lanzhou,730101,China)

机构地区：[1]兰州交通大学机电工程学院,兰州730070 [2]兰州长信电力设备有限责任公司,兰州730101

出　　处：《核动力工程》2024年第3期206-212,共7页Nuclear Power Engineering

基　　金：甘肃省重点研发计划(21YF5GA156)。

摘　　要：针对核电钠冷快堆钠-空气热交换器风阀在高温工作环境下存在的叶片卡涩现象和阀体强度失效问题,设计了一种双叶片钠冷快堆钠-空气热交换器风阀。利用流热固耦合方法对该风阀在不同开度下的流场流动特性、阀体温度分布、阀体变形及应力情况进行了研究。结果表明:①风阀在开度45°以下时,流体通过风阀前后会产生明显的速度梯度和压力梯度;②局部温差越大的区域热应力值越大,最大应力为206.94 MPa,出现在框架侧密封板边缘处,最大应力值符合材料强度要求;③阀体变形及应力主要为受热引起的热变形和热应力,风阀最大变形量为3.3368 mm且框架变形量在各个方向均大于叶片变形量,新设计的风阀不会产生叶片卡涩现象。Aiming at the problems of blade sticking and damper body strength failure of sodium to air heat exchanger in nuclear power sodium-cooled fast reactor under high temperature working environment,a double-blade damper for sodium to air heat exchanger of sodium-cooled fast reactor was designed.The characteristics of flow field,temperature distribution of damper body,deformation and stress of damper body with different opening degrees were studied using fluidthermal-solid coupling method.The results show that when the opening of damper is below 45 degrees,the fluid will have obvious velocity gradient and pressure gradient before and after it passes through damper.The greater the local temperature difference,the greater the thermal stress value,and the maximum stress is 206.94 MPa,which appears at the edge of the frame side sealing plate,and the maximum stress value meets the material strength requirements.The deformation and stress of damper body are mainly thermal deformation and thermal stress caused by heating.The maximum deformation of damper is 3.3368 mm,and the deformation of the frame is greater than that of the blade in all directions.The newly designed damper has no phenomenon of blade sticking.

关 键 词：钠-空气热交换器 风阀 流热固耦合 热应力 

分 类 号：TL353.1[核科学技术—核技术及应用]