消能孔板空化特性的数值模拟

Numerical Simulation of Cavitation on Orifice Energy-dissipator

采用大涡模拟方法对消能孔板流场及空化现象进行了数值模拟 ,研究分析了消能孔板空化特性 ,计算所得的压力分布及空化特性与减压模型实验结果进行了比较 ,二者符合良好。计算结果表明 ,采用大涡模拟方法模拟空化是可行的。由于数值模拟不仅可以给出详细的流场特征 ,而且不受比尺效应影响 ,故可成为研究空化问题的有力手段。

The Large eddy Simulation (LES) is used to simulate the flow field and cavitation on an Orifice Energy dissipator. The characteristics of cavitation was analyzed. The calculated and the measured pressure distribution and the cavitation were in agreement. The calculated results indicate that it is feasible to use LES method to simulate the cavitation. The numerical simulation can be used to calculate the flow field in details. Moreover, the calculated results are not affected by the “scale effects”.