排沙涡管泄流量和泄流比之估算

Estimate of Discharge and Discharge Ratio for Sadtrapping Tube

由于排沙涡管具有排沙效率高、结构简单等优点,被用于电站或灌溉引水渠以排除中粗颗粒泥沙。涡管泄流盈大小决定着排沙量的多少。试验得知:当排沙涡管开口全部被水流淹没而形成满管流后,其开口长度和宽度对泄流量影响较小,涡管与水流方向的夹角对泄流量影响较大。本文通过实验和实例,说明了泄流量和泄流比的估算。

Due to simple structure and high effeciency in sediment release the sadtrapping tube is widly used on intakes of hydropower plants and irrigation systems to trap medium and big grain of sediment. The amount of released sediment is in dependence on discharge. The test shows that the discharge is less influnced by length and width of opening slots when the slot is fully imerged and the tube is full of water. A method of estimating discharge and discharge ratio is presented on the basis of experiment and explained through a example.