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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, we study the potential flow problem of free surface. According to the difference between the contribution of velocity head and free surface height to the residual residual pressure on the free surface, we can return it to the residual pressure according to a certain rule so that the residual pressure and freedom The height of the surface is continuously adjusted during the iteration. As a result, a free-surface iterative method-residual voltage feedback method is presented, which is simple and easy to implement. Applying this method, the outflow of slab gate, over flow of overflow spillway, overcurrent of semicircular projection, anti-arc of single arc and free-flow pick were calculated. The calculated results are compared with the results of other methods or experimental data. The results are quite satisfactory. The proposed method has the advantages of simple iterative process, clear algorithm and good convergence.