【摘要】 开发了能模拟复杂紊流的三维数学模型，编制了大型计算程序，针对拉西瓦水垫塘进行了数值模拟，揭示了水垫塘内速度、压力、紊动能及其耗散率的三维分布规律。获得了详细的水垫塘流态特性。研究了水流紊动扩散及消能特性，反映出紊动和消能大量地发生在射流轴线附近，计算所得的底板最大冲击动压与实验值进行了比较，二者符合良好。更多还原

【Abstract】 A 3-D mathematical model for simulating the complicated turbulent flows was developed and the code was made. A numerical calculation of the plunge pool of Laxiwa Project in China was carried on. Those 3-D distributions of velocity,pressure on the bottom wall, Turbulence kinetic energy and turbulence energy dissipation rate are revealed in detail and the detailed flow patterns of plunge pool were shown. By studying the characteristics of turbulent diffusion and energy dissipation, the calculated results show that the major turbulence and energy dissipation are taken play near to the axis of water jet. The calculated results also indicated that the calculated maximum impact pressures on the bottom wall of the plunge pool have a good agreement with those obtained by physical hydraulic model test.更多还原