计算二维自由面势流的“残压反馈”方法

Residual pressure feedback method for the simulation of flow with free surface

本文对研究有自由面的势流问题,根据速度能头和自由面高度能头对自由面上迭代残压的贡献比重不同,将其按一定规律反馈回残压中,从而使残压与自由面高度在迭代过程中不断得到调整。由此,提出了一种简单易行、迭代程序简明的自由面迭代法——残压反馈方法。应用这一方法,对平板闸闸下出流,WES溢流坝过流,半圆形突体过流,单圆弧反弧段及自由挑流等进行了计算。将所得计算结果与其它方法的计算结果或试验数据进行了比较,结果都颇为满意,该方法具有迭代过程简单,算法明了,收敛性好等特点。

In this paper a simple and efficient iteration method for determining the free surface itemed Residual Pressure F.eedback method (RPFM) is proposed. Some typical flow in hydraulic engineering are calculated by using the presented method. The calculation results are in good agreement with the experiment data or results obtained from other methods.