枕头坝水电站泄流能力研究

Study on Discharge Capacity of Zhentouba Hydropower Station

针对枕头坝水电站泄洪闸的泄流能力问题,采用理论计算和模型试验对比的方法,分析了影响泄洪闸泄流能力的因素及泄流能力试验值与设计值之间存在较大偏差的原因,并对流量系数进行了参数反演计算。结果表明,泄洪闸的布置形式、上游导流墙的存在和流态的稳定性等因素均对泄洪闸的过流能力有一定影响,尤其当泄洪闸过流流态为孔流时不利影响较明显。

In order to study the discharge capacity of Zhentouba Hydropower Station,the method of comparing theoretical calculation with model experiment is adopted to analyze the factors for influence discharge capacity of flood diversion sluice and the reasons of large deviations between the experiment values and design values.And then,the parametric inversion calculation is carried out for flow coefficients.The results show that some factors,such as layout mode of flood diversion sluices,the existence of upstream diversion wall and flow regime stability,have some impacts on the flow capacity of flood diversion sluice;especially,the adverse impact is distinct when the flow regime is orifice flow.