低佛氏数底流消能辅助消能工模型试验分析

Model Test and Applied Research on Assistant Energy Dissipater of Low Froude Number Bottom Flow Energy Dissipation

低佛氏数底流消能的消能效率低,消力池工程量大,往往需要设置辅助消能工。结合某电站消能防冲段模型试验,对3种形式辅助消能工的水流流态、消能率、经济效益进行了分析,结果表明:在消力池末端布置T形消能墩,可发挥其增加小尺度旋涡、增强局部紊动、混掺水流的功能,提高消能率,而且可使消力池尺寸大大缩小,经济效益十分显著,是一种较理想的适用于低佛氏数泄水建筑物的辅助消能工形式。

Auxiliary energy dissipater is often needed due to the poor energy dissipation efficiency of low Froude numbers.The results of the experiments indicate that the assistant energy dissipater can solve the problems of energy dissipation and erosion-control of flood discharging structure for low Froude number bottom flow energy dissipation.Lots of factors such as flow pattern,energy dissipation ratio,and economic benefits were investigated via the model test of some power plants of energy dissipation and anti-scouring sect T-type pier.The results show that T-type pier stilling pool is a desirable energy dissipation form which is fit for low Froude number discharge structures and deserves popularization and application in engineering.