大坡降复合式水平旋流内消能泄洪洞阻塞扩散段试验研究

以两河口水电站3#导流洞改建为复合式大坡降水平旋流内消能泄洪洞为例,对大坡降水平旋流洞末端和导流洞之间的衔接方式进行了试验研究。提出了阻塞渐扩和阻塞突扩两种不同的衔接方式,并对两种旋流扩散体型局部流态及壁面压强、断面掺气浓度、旋流扩散轨迹等水力特性进行了量测与分析,得到各体型旋流扩散段流态及各项水力特性随上游水位变化的基本规律。

Study On The Hydraulic Characteristics Of Compound Large Gradient Horizontal Rotary Flow In-energy Dissipating Spillway

Taking the 3# diversion tunnel of Liang Kekou hydropower station reconstruction Compound Large gradient horizontal rotary flow in-energy dissipating spillway as an example,this paper studies the Large gradient horizontal rotary flow tunnel and diversion tunnel connection mode for hydraulic characteristics. Through measurement and analysis using gradually increased clogging and abruptly increased clogging two different connection modes to generate swirl diffuser local flow and the pressure on wall surface, the section consistency of aerated flow, swirling diffusion trace,etc. Finally we get the relationship between the different swirl diffuser hydraulic characteristics and the upstream water level.