黄羊河水库输水洞改建工程明流段体型研究

黄羊河水库输水洞在运行中明流段水流脱离底面而抛出泄槽,水力学模型试验反演了这种水流现象.理论分析表明,原因是渥奇面太"瘦",简单地加"肥"渥奇面,工程量过大,不满足工程需要.根据俯冲射流原理提出改建方案,改建工程量较小,水力学模型试验表明改建方案水力特性良好,成功地解决了该工程存在的水力学问题.

Research for canal type of open flow section of the reconstructed Huangyanghe reservoir conduit

The flow in open channel of Huangyanghe reservoir conduit separated from bottom and jumped out of release channel in operation, this flow phenomenon is simulated by hydraulic model test. Theoretical analysis demonstrates that the cause of this flow phenomenon is too thin Ogee surface. By simply enlarging Ogee surface, it doesn't meet works requirement for large work quantity. According to dive jet principle, the reconstructed scheme is suggested. The work quantity for the suggested reconstruction scheme is small, the model test demonstrates that the hydraulic characteristics for reconstructed conduit is good, and the hydraulic problems in the conduit are solved successfully.