台阶式溢流坝的消能设计与试验

由于台阶式溢流坝坝面台阶的存在,使下泄水流在台阶之间形成横轴旋滚,并与坝面主流发生强烈掺气作用,使水流紊动加剧、掺气增强,大大减少了下泄水流的能量,改善了坝址处的水利条件,使坝下游的消能设施得已简化.结合光明水电站水工模型试验,对消能率进行了研究,结果表明:影响台阶坝面消能率的主要因素为台阶坝高、台阶的突出高度、台阶坝的坡度和单宽流量.同时推导出消能率的计算公式.该公式可为相关设计提供参考.

The energy dissipation design of Stepped spillway and test

As a result of the existence of stepped spillway dam,water discharged in the steps forms a horizontal rotation between steps and produces the violence gas action along the mainstream of dam surface,which make flow turbulence prick up,aeration increased significantly reduces the discharge of flow energy,improve the water resource condition of the site of the dam,and predigest the energy dissipation facilities downstream dam.Combination with Guangming hydropower station and Hydraulic model test,the rate of en...