【摘要】 通过陕西汉江旬阳水电站冲沙闸的单体水工模型试验,研究大泄量、中低水头、大单宽和大变幅相对淹没度条件下,冲沙闸在消力池、护坦及基岩3种不同下游消能形式时的水力特性,特别是高淹没条件下的泄流能力设计、计算和大变幅相对淹没度hs/H0条件下的运行方式为泄洪或排沙时下游消能形式的选择。当泄洪时,下游水位高,hs/H0大,护坦和基岩消能形式较优,综合流量系数m′在0.298~0.329之间;当排沙时,hs/H0变幅大,适宜采用消力池消能形式。更多还原

【Abstract】 A single hydraulic model test of the scouring sluice of the Xunyang Hydropower Station on the Hanjiang River in Shaanxi Province identified the hydraulic characteristics of the scouring sluice under three different energy dissipaters.Stilling basin,apron and bedrock were studied under the condition of large discharge,middle-low water head,large unit discharge and relative submergence degree of large variable head.In particular,the discharge capacity design and calculation with a high submergence degree is analyzed,and the election of energy dissipaters in the lower reaches in the operation mode of flood discharge and sediment ejection operational mode with a relative submergence degree(hs/H0) of large variable head is analyzed.During flood discharge,the water level is high and the value hs/H0 is large,the energy dissipater of bedrock is better,and the aggregate discharge coefficient m′ ranges from 0.298 to 0.329.Also,the variable head of the submergence degree hs/H0 is large,and the energy dissipater of the stilling basin is more appropriate.更多还原