摘要
该文采用雷诺平均的N-S方程和k-?紊流模型,建立了三维水流数学模型,对某天然河道取水口前沿设置导沙底墙的水流效应进行了模拟,计算结果与试验实测结果吻合较好。进一步对导沙底墙附近的水流运动规律进行分析,结果表明:在取水口前沿布置导沙底墙,改变了底墙间底层水流的流向,使底墙顶部附近产生了较强的螺旋流,可以实现导底沙、取清水的工程效果。说明所建立的数学模型可以较好地描述导沙底墙形成的螺旋流及其分布特征,可为此类工程的方案分析提供参考。
A 3D numerical model is established to simulate the flow around the water intake in the natural river, based on the RANS equations and κ-εturbulent model. The validity of the model is verified by relevant experimental data. Analysis shows that the direction of the bottom flow is changed by the submerged vanes, this cause the helical flow around the top of the vanes, the sediment is diverted away from the intake, and the upper clear water flow to the bank-side. It is proved that the numerical model can be used to describe the distribution of the helical flow around the submerged vanes and provide the reference for the engineering design.
出处
《水动力学研究与进展（A辑）》
CSCD
北大核心
2014年第2期238-244,共7页
Chinese Journal of Hydrodynamics
基金
广东省水利科技计划项目~~
关键词
导沙底墙
取水防沙
数值分析
螺旋流
submerged vanes
water diversion and sediment control
numerical analysis
helical flow
