对于多级洞塞泄洪洞而言,上下级洞塞之间的合理间距影响到洞塞消能能力的发挥,因此有必要研究多级洞塞中上下级洞塞之间的合理间距。采用数值模拟手段,研究了上下级洞塞之间的间距问题。研究结果表明,当孔径比在0.4～0.8范围内,只要上下级洞塞之间的间距达到5.7D以上,各级洞塞均能充分发挥各自的消能能力。研究结果可为多级洞塞设计提供参考。
The distance between upper plug and lower plug affects the energy dissipation capacity of multi-stage plug discharge tunnel. In the present paper, the reasonable distance between the upper plug and the lower plug in multi-stage plug discharge tunnel is researched by numerical simulations. Result shows that when the contraction ratio is in the scope of 0.4-0.8, a reasonable distance between upper plug and lower plug equal to or more than 5.7D would guarantee the full display of plugs in different stages.
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