Critical Submergence for Intakes in Open Channel Flow
Critical Submergence for Intakes in Open Channel Flow
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DOI：
10.1061/(asce)0733-9429(1995)121:12(900
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发表时间：
1995-12
影响因子：
2.4
通讯作者：
N. Yıldırım;Fikret Kocabas
中科院分区：
文献类型：
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作者：
N. Yıldırım;Fikret Kocabas
在本研究中，研究了均匀运河流中进气道处引气涡的临界淹没。点汇和均匀管流组合的势流解是可用的，被称为朗肯卵泡或半体。这项研究是基于朗肯卵泡。实验表明，当朗肯卵泡的上边界到达进气中心正上方的水面时，就会发生临界浸入。理论和实验结果表明，在均匀运河流中，进水口的临界淹没等于一个假想的球形水槽表面的半径（假设没有运河流），其中径向速度等于均匀运河流速度的一半。假想的球形水槽具有与进气口相同的中心和流量。理论临界淹没与实验结果吻合较好。
In this study, critical submergence for an air-entraining vortex at intakes in a uniform canal flow was investigated. The potential flow solution for the combination of a point sink and a uniform canal flow is available, and is known as Rankine's ovoids or half-bodies. This study was based on Rankine's ovoids. Experiments have shown that the critical submergence occurs when the upper boundary of Rankine's ovoids reaches the water surface directly above the intake center. Theoretical and experimental results have indicated that the critical submergence for an intake in a uniform canal flow is equal to the radius of an imaginary spherical sink surface (assuming no canal flow) where the radial velocity is equal to half of the velocity of the uniform canal flow. The imaginary spherical sink has the same center and discharge as the intake. The agreement between the theoretical critical submergence and experimental results is found to be good.