膜片稳压溢流阀的瞬态数值模拟方法研究

A study on the transient numerical simulation of diaphragm over valve

论述了计算流体动力学(CFD)分析中生成动态网格的主要技术,并应用在稳压膜片溢流阀瞬态CFD动态网格的划分和计算,保证了模拟的不失真,从而较好地解决了由于阀瓣运动所导致计算区域瞬时变化的问题。通过与实测值的比较,验证了CFD数值模拟在分析和预测溢流阀特性上的可行性。

By using Computational Fluid Dynamics （CFD）, the working process of diaphragm over valve is transiently simulated, and the technique of dynamic mesh in the CFD transient analysis is analyzed. In order to make the computer model adaptive, relevant dynamic meshes which are created or suspender according to the move of valve clack are adopted to update the CFD model in every time step. Compared with the experiment data, the simulation data shows the CFD simulation is feasible in prediction and analysis on the performance of diaphragm over valve, which also indicates that CFD can be a strong tool for us to study the hydrodynamic characteristics of diagphragm over valve.