逆止阀内部流场的数值模拟与分析

应用软件CATIA生成计算模型,并利用前处理软件HYPERMESH对逆止阀模型进行网格分割。采用FLUENT软件中标准k-ε方程的湍流模型对逆止阀内部流场进行三维数值模拟。分析不同阀座及阀瓣角度下,逆止阀的内部流场情况,并得出如下结论:当阀瓣达到最大开度时,逆止阀流阻系数随着阀座角度的增大而增大;又基于动量定理,对逆止阀阀瓣与阀座间的冲撞关系给出了具体的计算结果;并考虑了逆止阀的密封性,计算了阀座对阀瓣的支撑力,由此作为选取最优阀瓣及阀座配合的依据。

Numerical Simulation and Analysis of the Flow Field of Check Valve

This paper firstly used the CATIA to establish the geometrical model, and used the pre-processing software HYPERMESH to generate simplified grid model, then used FLUENT software standard k-e equation of turbulence model to simulated calculation for the three-dimensional separated flow of check valve. On the basis analyzed the internal flow field of different max angle valves and gave several conclusions as follows： when the check valve disc angle is max, the flow resistance coefficient increases with the degree of seats sustained increases. Based on the momentum theorem, the collision relations between seats and disc are given. Considered the check valve sealing, the support force by seat was calculated. According to these three points, there is a result of an optimal case.