低水头水闸消力池三维数值模拟

Three-dimensional Numerical Simulation of Low Head Sluice Stilling Basin

结合某低水头水闸设计与试验资料,采用计算软件模拟水闸消力池三维水流。通过调整消力池对原设计方案进行优化,对典型工况进行数值模拟。得到的水闸过流能力、水流流态、流速分布、水面线与物理模型观测值较为吻合。在此基础上用数学模型分析消力池的消能率,可知二级消力池能提高低弗氏数水跃消能效率,优化方案有效可行。

Combining with the design and test data of a low head sluice,this paper used calculation software tosimulate three - dimensional flow of sluices stilling basin. The study optimized the original design by adjusting the stillingbasin,and simulated the typical working conditions. The results such as sluice discharge capacity,flow regime,flowvelocity distribution,and water surface line are consistent with the physical model observations. Based on this,thispaper analyzed the energy dissipation rate of stilling basin by using mathematical model,revealed that secondary stillingbasin can improve the energy dissipation efficiency of water jump with low Freund number ;the optimization scheme iseffective and feasible.