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丁坝具有导流、护岸、调整水深和营造局部冲淤等众多功能,在实际工程中应用广泛。文章采用有限体积法对正挑丁坝群的周围流场分布进行了三维数值模拟,以期深化对丁坝群附近的水流流场及局部冲刷机理的认识。研究发现,流场中有三个大的逆时针旋涡产生,第一座丁坝坝头处有下潜水流,且切应力达到最大值,是该位置发生严重冲刷的主要原因,且流量越大,冲刷越严重。
Dingba diversion, revetment, adjust the depth and create a number of local scour and other functions, widely used in practical engineering. In this paper, the finite volume method is used to simulate the three-dimensional numerical simulation of the flow field near the Dingba group, with a view to deepening the understanding of the flow field and local erosion mechanism near the Dingba group. It is found that there are three large counterclockwise vortices in the flow field. The first dam has a submerged current at the head of the dam and the shear stress reaches the maximum value, which is the main reason for serious erosion at this position. The larger the flow rate, The more serious.