基于水的弱可压缩特性的圆管流动分析

摘要

在通常的流动计算中，水的弱可压缩特性经常被忽略掉，然而其对流动计算的影响是很明显的。为了验证可压缩特性对流动特性的影响，对一圆管分别采用了可压缩模型和不可压缩模型进行流动计算，得到了圆管内的压力脉动，通过计算结果与实验值的比较，发现前者的预测值比后者更接近实验值。%The weak compressibility of water is always neglected in usual flow calculation .However, its influence upon flow calcu-lation is obvious .To verify the influence of the compressibility on flow characteristics , the flow in a pipe is calculated by using com-pressible model and incompressible model , and the pressure pulsation in the pipe is obtained .Through comparing with experimental values, it is found that the pressure pulsation predicated by the cavitation model which considers the compressibility of water is closer to the experimental value than that predicted by the cavitation model without consideration of compressibility of water .