Experimental Study And Numerical Simulation On Optimal Design Of Stilling Basin With T Type Baffle

Stilling basin with T-type baffle is horizontally bedded with auxiliary dissipator which has a T shapedbaffle in plan and supporting leg connected with end sill. It is suitable for low dam, and a impulse typestilling pool in small and medium-sized engineering of a single wide flow and the Froude number isFr=3～7underflow. T-shaped pier stilling basin structure stability, can not only improve the efficiency, butalso can shorten the basin’s length, raise economic benefits. This paper presents a concept of T-shaped pierstilling basin block width ratio, and research in T-shaped pier stilling basin of energy dissipation effectthrough the block width ratio of this effect of T-shaped pier spacing factor.This paper uses two kinds of methods. One is model test, the other is numerical simulation. Combinedwith theoretical analysis, respectively research in energy dissipation effect on T-shaped pier stilling basin ofT-shaped pier of different spacing, and the result has mainly:(1) Deduced and validated the critical hydraulic jump equation of T-shaped pier stilling basin containinga T-shaped pier block width ratio, drag coefficient and pier Hom resistance of T-shaped pier stilling basin,and contains block width ratio of T-shaped pier stilling basin of energy dissipation calculation formula.(2) Verified by model test of T-shaped pier spacing on stilling basin energy dissipation effect andvariation; determine the optimal block width ratio is40%~45%of T-shaped pier, the optimal distance in therange of3.3m~3.6m. Research energy dissipation effect on T-shaped pier stilling basin in optimal spacingbetween energy dissipation and into the basin Froude number Fr. Given the relationship between energydissipation rate k and into the basin Froude number Fr.(3) Through the model test of differential end sill–T-shped pier stilling basin of T-shaped pier spacingon stilling basin energy dissipation effect, determine the differential end sill–T-shaped pier stilling basin ofthe block width ratio is40%, and the differential end sill–T-shaped pier stilling basin of energy dissipationand into basin number between Froude Fr. And compared with continuous end sill case of T-shaped pierstilling basin of energy dissipation effect.(4) By using the numerical simulation method of T-shaped pier stilling basin of water inside thesimulation, the numerical simulation calculation the stilling basin entrance and the T-shaped pier before thewater surface line, position of flow, flow velocity and physical model test results are compared.(5) Through numerical simulated, T-shaped pier and into the basin to the energy of the T-shaped pierstilling basin water flow regime, flow velocity, the bottom pressure and turbulent kinetic and energydistribution of hydraulic characteristics of the impact of the law.