锥形阀消力池淹没射流的大涡结构及特征

The large-scale Vortex Structure and the Characteristics of Submerged Impinging Jet in the Valve-shaped Absorption Pond

结合盘石头水库输水洞模型试验 ,应用现代紊流理论 ,对输水洞下游锥形阀消力池内的复杂流动结构进行了观测试验和定性分析 ,并从紊流力学的角度对耗散作了机理性分析 .认为锥形阀消力池内流态的显著特点是锥底存在较大范围的卷吸区 ,流态具有强三维性 ,大尺度涡拟序结构对池内的流速分布、压强分布及消能起主导作用 。

Based on contemporary viewpoints about turbulent theory,the complicated flow structure and the coherent structures of large scale vortex in the impinging region are observed and qualitatively analyzed.From the angles of Turbulent Dynamics,the mechanism and the theory of the fluctuant pressure's origin,the energy's transference,and dissipation in the pond are explained theoretically.The analyses show that a larger rolling absorbing area exiting near the bottom of the valve and a stronger three dimension are the remarkable flow characteristic in the pond and the large scale vortex structures have determinative influence on the distribution of the velocity of flow,the pressure and the dissipation.This paper provides a theoretical foundation for further research on energy dissipation,design and protection of the cone shaped valve absorption pond.