船闸输水基本方程的应用

根据总流非恒定流的能量方程推导了船闸输水基本方程,对某船闸灌水过程进行了数值模拟。由于输水系统存在惯性,在灌水后期闸室水位出现反向水头即超高,当闸室水位从最大超高开始下降,水体从闸室流向引航道,此时,基本方程中水头损失项必须取与阀门处流速相同的符号。建议在相关规范修订时,将船闸输水基本方程改为文中推荐的公式,以便于应用。

Application of basic equation of water filling-emptying for ship lock

Based on the energetics equation of total unsteady flow,a basic equation of water filling-emptying for ship lock is deduced,and then the filling process of a ship lock is numerically simulated.During the later filling period,a reverse water head,i.e.over-filling occurs in the lock chamber.When the water level drops from the maximum over-filling,water flows to the leading channel;for which the same symbol for the flow rate at the valve must be taken for the item of the head loss in the basic equation.It is suggested that the basic equation of water filling-emptying for ship lock prescribed in the relevant rule can be replaced by the equation given herein for the convenient application to the practice concerned,when it is revised.