基于双流体模型的气液两相水锤计算方法

Water hammer simulated method based on two-fluid model in two-phase flow

基于气液两相流双流体模型,采用矢通量分裂（SW-FVS）与无波动无自由参数（NND）相结合的空间和时间上均为二阶精度的差分算法,推导并构造出一种考虑相间质量变换、管壁与流质相互作用的一维计算模型.通过辛普森关阀试验及离心泵断电模拟试验的对比,证明了该模型在计算带有明显的相间作用的瞬变现象的适用性及对于压力瞬变模拟的准确性,同时由于该计算方法易于程序化,在水力机械过渡过程的计算中具有一定应用价值.

A two-phase two-fluid model was introduced by the method of Steger-Warming flux vector splitting（SW-FVS） combined with NND scheme with the second order accuracy in both space and time.This model took the mass transfer between two phases and the interaction between the liquid and wall into consideration.Simpson？s valve closure water hammer experiment and the simulation of failure of pump in the horizontal pipeline system in Wuhan University were chosen to validate the applicability and accuracy of the two-phase flow model.Results show that this model can be reliable in stability of the simulation,and a reasonable agreement can be achieved by comparing to the results between experimental and simulation.As this method is easy programmed,it has a certain application value in the calculation of the transient process of hydraulic machinery in two-phase flow.