摘要
本文采用拉格朗日法 ,考虑泥沙颗粒水体的拖曳力 ,浮力、压差力和附加质量力的合力作用 ,并用随机方法计入流体紊动的影响 ,建立颗粒随机运动轨迹方程。采用三维 k-ε模型模拟流场。本文以一抽水蓄能电站为例 ,预测了在抽水情况下排入上池湖泊中的五个粒径组的泥沙在不同时刻的运动轨迹、速度及在三维空间上的体积浓度分布 ,预测了各种粒径沙粒可能沉降的位置。
A random trajectory model (RTM) based on the Lagrangian method was established in this paper. The effects of water drag force, pressure gradient force, buoyancy and virtual mass force on the particles were included and the turbulent dispersion was modeled by the random method. Three-dimensional k-ε model was used to calculate the flow field. A pumped-storage power station, with a natural lake as its upper pool, was taken as a case for the study. Averaged trajectories, velocities and the volume-concentration distributions for 5 groups of sediment particles were predicted with the RTM. The possible silted locations in the lake were also predicted.
出处
《水动力学研究与进展（A辑）》
CSCD
北大核心
2001年第3期295-302,共8页
Chinese Journal of Hydrodynamics
