【摘要】 鉴于空化数值模拟软件适用范围和计算精度尚需进一步检验,采用Star-CD软件,以一种界面捕获方法来模拟空化,并选择正压模型对离心泵内部流场进行模拟,计算得到了各单元和节点的压力、速度和液体体积分数,通过调整进口断面参考点的参考压力,模拟了叶轮内的空化发生和发展过程,对比了空化发生后的性能参数与基准值。结果表明,正压模型能较好地预测叶轮的空化性能。更多还原

【Abstract】 The scope of application and computing precision of cavitation numerical simulation software need to be inspected.Interface capturing method is introduced to simulate the cavitations with Star-CD software.And the positive pressure model is selected to simulate the inner flow field of centrifugal pump.Then the pressure,velocity and liquid volume fraction of each element and node are calculated.At the same time,the cavitations gradually occurring and developing in the impeller are simulated by the way of adjusting the reference pressure of reference points in inlet section.Finally,the difference between the performance parameters after the cavitations and the reference values are compared.The results show that the positive pressure model can predict the impeller’s cavitation performance very well.更多还原