【摘要】 利用异重流排沙是多沙河流上蓄水运用水库普遍采用的排沙方式.本文应用隐式差分格式对非恒定异重流运动方程和连续方程进行了数值求解.下边界条件与泄水底孔的布置和尺度联系起来,上边界为给定的异重流非恒定流量或深度的变化过程,假定异重流含沙量沿程不变,可进行异重流深度或异重流流量沿程传播和经孔口排出量的近似计算.最后利用部分水槽试验资料进行了实例计算和验算.更多还原

【Abstract】 For predicting the efficiency of venting density current out of a reser-voir,it is necessary to know about the transmitting process of density current along the channel and the thickness of density current reaching the dam. By using the implicit method and double sweep method, the dynamic and continuity equations of unsteady density current are numerically solved. The boundary condition at downstream end is related with the layout of the outlet of a dam, and the boundary condition at the entrance can be given by the discharge or the thickness hydrograph of density current. Practical calculations are conducted using flume data.更多还原