涡管排沙技术研究的发展与前瞻

Progress in Research of the Technique of Sediment Trapping by Vortex Vortex Tube

通过对涡管排推移质泥沙机理的分析及试验研究 ,提出涡管排沙的三个参数 :涡管分流比、截沙率及挟沙能力 .对涡管与渠道水流方向的夹角、渠中水流的佛劳德数及涡管开口宽度等参数与排沙效率的关系也分别进行了研究 .通过对悬移质分选沉降的理论研究 ,提出了悬移质涡管排沙的计算方法 ,该方法已成功地应用于沙湾县金沟河渠首水电站沉沙池的设计上 .

Based on studies on the mechanism of sediment trapping by the vortex tube and flume and model experiments,three parameters are proposed:the diversion ratio,the trapping efficiency and the sediment carrying capacity of the vortex tube.These parameters reflect the economic index of water consumption and the effectiveness of silt trapping of the vortex tube.Besides,the relations of the angle of the tube axis to flow direction in the channel,the Froude number of flow in the channel,the vortex tube slot width and so on with the trapping effectiveness are studied respectively.On the basis of theoretical study of sorted settling of the suspended load,a method is suggested to calculate desilting and trapping of the suspended load,which has been used in the design of a desilting basin of a water power project.A hydro electric project according to this design thought has been constructed already and has worked well for two flood seasons.