基于正交设计的黄池沟退水道弯道体型优化的数值模拟分析

Numerical simulation of shape optimization for Huangchigou overflow bend channel based on orthogonal design

为探求黄池沟退水道弯道的合理体型,采用正交设计与数值模拟相结合的方法研究了体型参数对弯道水流的影响。选取弯道宽度、弯道曲率半径、纵向坡度3个主要影响参数按正交试验设计,确定了9组正交试验方案,利用经水工模型试验结果验证的数学模型对正交试验方案进行模拟,分析了体型参数对弯道及下游陡坡段横向水位差的影响。结果表明,3个体型参数影响作用由大到小依次为纵向坡度、弯道宽度和弯道曲率半径;坡度为显著影响因素,且平坡最佳,弯道曲率半径和弯道宽度影响不显著,据此推荐合理体型参数为坡度取0,弯道宽度和弯道曲率半径采用原设计值。

In order to explore the reasonable shape of the Huangchigou overflow bend channel,the influence of shape parameters on the flow was studied by means of orthogonal design and numerical simulation.Different parameter combinations were determined based on orthogonal experimental design for three shape parameters,including width of bend,radius of curvature and longitudinal slope.Nine sets of orthogonal experimental schemes were determined and simulated by the numerical model after validation by the experimental results from hydraulic model tests.The main factors affecting the water level difference in the bend sections and steep slopes were analyzed.The results show that the effect of the three shape parameters from the largest to the smallest is the longitudinal slope,bend width and the radius of curvature.The slope is a significant factor,and the flat slope is the best.The curvature radius and width of the bend have no significant impact.Therefore,a reasonable shape parameter is recommended that the slope is 0,and the original design values should be maintained for curvature radius and width of the bend.