Sensitivity Analysis on Influencing Factors of Vortex at Shore Inlet
In this paper,the three-dimensional numerical simulation method is used to analyze the multi-factor sensitivity of the causes of the vortex formation at the shore inlet.Combined with the influencing factors such as topography,flood discharge,trash rack and diversion tunnel inlet tower,and combined with different water levels and unit operation conditions,the water flow conditions of the inlet under various combination conditions are simulated and analyzed,and the formation mechanism of the vortex at the inlet is studied.The results show that the abrupt change of the terrain in the narrow valley is the key environmental factor for the formation of the vortex,and the flood discharge scheduling and the operation mode of the unit will affect the range and depth of the vortex;The inlet tower of the diversion tunnel can adjust the flow field of the inlet to a certain extent and affect the formation of the vortex;The trash rack can effectively improve the vortex flow pattern of the inlet.In engineering practice,the layout of the inlet,the addition of trash rack and vortex elimination pier and the optimization of the operation mode of the unit can be comprehensively considered to avoid the formation of the inlet vortex.
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