宽尾墩跌坎消力池消能水力特性模拟研究

Hydraulic Performances of Stilling Basins with Step-Down Floor Combined with Flaring Gate Pier by Numerical Simulation

为探究宽尾墩跌坎消力池消能机理及其水力特性,采用RNGκ-ε湍流模型结合VOF两相流数值模拟方法,对宽尾墩联合平底消力池、无宽尾墩平底消力池和宽尾墩跌坎消力池三种方案进行了模拟研究,对比分析了这三种方案的流态及水面线、临底流速、压强分布。结果表明:宽尾墩跌坎消力池表现出掺气充分,水流紊动剧烈,临底流速小,压强小且分布均匀等特点。

Three-dimensional RNG κ-εturbulence model with VOF method was used to study the stilling basins with step-down floor combined with flaring gate pier and other two comparative schemes of stilling basin and stilling basin combined with flaring gate pier. Water surface profile, velocity field and pressure distribution on the stilling basin floor were obtained. The results show that the stilling basins with step-down floor combined with flaring gate pier has better hydraulic performances such as more sufficiently diffused and aerated in all directions,more turbulent flow, smaller velocity at the bottom of the stilling basin,smaller pressure and more even distribution on the stilling basin floor.