| 收缩式洞塞泄洪洞的消能和空化特性 |
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| 引用本文： | 余 挺,田 忠,王 韦,许唯临.收缩式洞塞泄洪洞的消能和空化特性[J].水利学报,2011,42(2). |
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| 作者姓名： | 余 挺 田 忠 王 韦 许唯临 |
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| 作者单位： | 四川大学水力学与山区河流开发保护国家重点实验室,四川成都,610065 |
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| 基金项目： | 国家973计划资助项目(2007CB714105); 国家自然科学基金资助项目(50809043) |
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| 摘 要： | 摘要：本文结合某大型水电工程，采用试验和数值模拟相结合的方法，研究了收缩式洞塞泄洪洞的消能特性和空
化特性。常压模型试验表明，通过设置两级洞塞及其他附属设施，整个泄洪洞总消能率超过了67.3%，两级洞塞
的总消能率达到36.0 %，洞塞的消能效果十分显著。减压实验表明，通过对洞塞体型的精细优化，泄洪洞有压段
可以避免发生空化，洞塞本身具备一定的抗空化能力。通过数值模拟，揭示了泄洪洞有压段的流速场、压力场特
性，直观地表明洞塞的突缩突扩作用形成了大体积的水流紊动，从而达到消能的目的。
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| 关 键 词： | 洞塞泄洪洞 消能 空化 数值模拟 模型试验 |
Energy dissipation and cavitation characteristics of contracted plug in discharge tunnel |
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| YU Ting,TIAN Zhong,WANG Wei and XU Wei-lin.Energy dissipation and cavitation characteristics of contracted plug in discharge tunnel[J].Journal of Hydraulic Engineering,2011,42(2). |
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| Authors: | YU Ting TIAN Zhong WANG Wei and XU Wei-lin |
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| Affiliation: | YU Ting,TIAN Zhong,WANG Wei,XU Wei-lin(Sichuan University,Chengdu 610065,China) |
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| Abstract: | The hydraulic characteristics of a contracted plug discharge tunnel in a large scale hydropower project were studied by model test and numerical simulation.The results are as follows: the energy dissipation rate of the plug discharge tunnel is larger than 67.3% and the energy dissipation rate for two plugs reaches 36.0%,the effect of energy dissipation of plugs is remarkable.The characteristics of cavitation for the tunnel were experimentally studied in vacuum tank.The results show that cavitation was not d... |
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| Keywords: | plug discharge tunnel energy dissipation cavitation numerical simulation model test |
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