洞塞间距对多级洞塞消能影响的数值模拟研究

摘要

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 multistage 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.