竖井形式对调蓄隧道系统井喷的抑制效果分析

Suppression effect on the geyser in storage tunnel system with different shaft forms

为有效抑制调蓄隧道系统内井喷的发生,采用三维数值模拟方法研究突扩式和分流式两种竖井形式对井喷的抑制效果。结果表明:突扩式竖井可促使气泡头部分离,形成局部低压,并减小上部水体的上升动能,从而抑制井喷;分流式竖井可使一仓承接另一仓的上冲水体,阻止大部分水体向上冲,增大上部水体的下泄速度,从而抑制井喷;突扩式竖井对井喷的抑制效果更好,井喷强度降低达60%。

To effectively suppress the geyser in the storage tunnel system,the suppression effects of two different shaft forms on the geyser are investigated based on the 3-D numerical simulation.The results show that the protruding shaft can induce the separation of the gas-column head,and decrease the local pressure and the kinetic energy of the upper water,resulting in the suppression on the geyser.The shunt shaft can make one bin to undertake the other bin of the upward water,prevent most of the water moving up,and increase the leaky velocity of the upper water,resulting in the suppression on the geyser.The protruding shaft has better suppression effect on the geyser,and the geyser intensity can be reduced by 60%.