基于CFD的真空阀流固耦合及热应力分析

Fluid-Solid Coupling and Thermal Stress Analysis of Vacuum Valve Based on CFD

以大型高温真空阀门的主动冷却为研究对象,建立了阀体和流体的三维耦合分析模型。首先考虑阀体内冷却通道受稳定水流及均匀热流载荷的共同作用,分析了该共轭传热问题的控制方程。然后利用CFD的方法计算得到了在不同进水流速下流体的流场和阀体冷却效果。最后选择最优流速下的稳态温度场作为热载荷对阀体结构进行热应力分析,得到了阀体结构的应力云图与位移云图。通过对云图的分析证明了方案设计的合理性,并为今后的改进提供理论依据。

Taking the active cooling of large high temperature vacuum valve as the research object,the three-dimensional coupling analysis model of valve body and fluid is established.Firstly,the governing equation of the conjugate heat transfer problem is analyzed on the basis of the fact that the cooling channel in the valve body is affected by the steady flow and uniform heat flow loads.Then the flow field and cooling effect of the valve body at different inlet velocities are calculated through CFD method.Finally,the static temperature field at the optimal flow rate is selected as the thermal load to analyze the thermal stress of the valve body structure,and the stress and displacement cloud diagrams of the valve body structure are obtained.Through the analysis of the cloud image,the rationality of the scheme design is proved,and the theoretical basis is provided for the improvement in the future.