不同流量下渐扩段局部水头损失数值模拟

摘要

为研究不同流量下渐扩段局部水头损失规律,选取了MIKE软件的水动力(HD)模块,对渐扩段水面线进行模拟分析,从而得出局部水头损失的水面线、流场等相关规律,并与计算值进行对比.计算结果表明:模拟得到的渐扩段沿程水面线与计算值吻合较好,且从流场图上及水位对比图中可看出,MIKE软件更能很好地模拟出局部水头损失,大大减小计算的难度和复杂程度,且能做到精确模拟.研究成果可为相关实际水利工程提供依据.%The water surface profile of gradually broadened channel is simulated with HD (hydrodynamic) model in MIKE software,and the change rules of water surface profile and flow field of local head loss are obtained.The sim ulation results are compared with results calculated by empirical formula,and the conclusion reveals that the simulated water surface profile of gradually broadened channel agrees well with the calculation resuMIKE could better simulate the local head loss by reducing the difficulty and complexity of formula calculation,hence achieving a precise simulation.