浑水异重流孔口出流泄沙规律  

Analysis on turbid density current outflow through outlets

作　　者：范家骅[1] 

机构地区：[1]中国水利水电科学研究院泥沙研究所,北京100044

出　　处：《水利学报》2007年第9期1073-1079,共7页Journal of Hydraulic Engineering

摘　　要：对垂直壁孔口和底孔出流的室内试验资料,以及三门峡水库、官厅水库的现场异重流孔口泄沙资料进行分析,得到出流含沙量与孔口高度和泄出层厚度的经验关系曲线。此关系曲线可用于估算在一定条件(孔口流量、异重流含沙量、孔口高度)下的出口含沙量。最后分析了孔口距底高度对浑水异重流孔口出流的影响,提出设计多沙河流上水库浑水异重流孔口泄沙的孔口位置时应注意的要点。Laboratory experimental results and field data from the Sanmenxia and Guanting Reservoirs for density current outflow through outlets were analyzed. A simple model describing the effect of outlet elevation on outflow concentration was suggested, and an empirical relationship between the outflow concentration and outlet elevation was established. The derived formula can be used to estimate the turbid density current outflow through outlets.

关 键 词：异重流孔口出流 选择性取水 孔口排沙 取水防沙 分层流 浑水异重流 

分 类 号：TV145[水利工程—水力学及河流动力学]