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。
Abstract
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.
关键词
多级洞塞 /
能量损失 /
数值模拟 /
合理间距 /
消能能力
Key words
multi-stage plug /
energy loss /
numerical simulation /
reasonable distance /
dissipation capacity
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基金
宁夏回族自治区重点研发计划项目(2016KJHM126);宁夏高等学校科学研究项目(NGY2016166);北方民族大学校级重点科研项目(2015KJ12);宁夏回族自治区高等教育教学改革项目(NXJG2016058)
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