| Hydraulics of a multiple slit-type energy dissipater简 |
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| 引用本文： | 吴建华,姚莉,马飞,吴伟伟. Hydraulics of a multiple slit-type energy dissipater简[J]. 水动力学研究与进展(B辑), 2014, 26(1): 86-93. DOI: 10.1016/S1001-6058(14)60010-X |
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| 作者姓名： | 吴建华 姚莉 马飞 吴伟伟 |
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| 基金项目： | Project supported by the National Natural Science Foundation of China （Grant No. 51179056）. |
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| 摘 要： | With the constructions of high dam projects in China, the energy dissipation downstream of a dam becomes a serious concern. In this study, a multiple slit-type energy dissipater, with different reduction size slits in the outlet, is developed on the basis of conventional slit-type energy dissipaters, aiming to enhance the energy dissipation through the turbulence and the friction between the different layers of the jet flow and the air entrainment due to the increased surface of the flow to the air. The hydraulic characteristics of the energy dissipater are experimentally investigated by means of three sets of physical models in nine cases, to characterize the geometric parameters with suitable performance. The main concerns are the flow regime, the jet flow trajectory, the energy dissipation, the cavitation characteristics, and the flow choking. The results indicate that the dissipater enjoys a high energy dissipation ratio with suitable hydraulic performance comparing with the conventional slit-type energy dissipaters.
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| 关 键 词： | 水力特性 消能工 狭缝式 能量耗散率 空气夹带 性能比较 几何参数表 大坝下游 |
| 收稿时间： | 2013-10-12 |
Hydraulics of a multiple slit-type energy dissipater |
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| WU Jian-hua,YAO Li,MA Fei,WU Wei-wei. Hydraulics of a multiple slit-type energy dissipater[J]. Journal of Hydrodynamics, 2014, 26(1): 86-93. DOI: 10.1016/S1001-6058(14)60010-X |
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| Authors: | WU Jian-hua YAO Li MA Fei WU Wei-wei |
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| Affiliation: | [1]College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China [2]Hydraulic Structures Design Division, Hydrochina Huadong Engineering Corporation, Hangzhou 310014, China |
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| Abstract: | With the constructions of high dam projects in China, the energy dissipation downstream of a dam becomes a serious concern. In this study, a multiple slit-type energy dissipater, with different reduction size slits in the outlet, is developed on the basis of conventional slit-type energy dissipaters, aiming to enhance the energy dissipation through the turbulence and the friction between the different layers of the jet flow and the air entrainment due to the increased surface of the flow to the air. The hydraulic characteristics of the energy dissipater are experimentally investigated by means of three sets of physical models in nine cases, to characterize the geometric parameters with suitable performance. The main concerns are the flow regime, the jet flow trajectory, the energy dissipation, the cavitation characteristics, and the flow choking. The results indicate that the dissipater enjoys a high energy dissipation ratio with suitable hydraulic performance comparing with the conventional slit-type energy dissipaters. |
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| Keywords: | aerator cavity length fin lateral deflector |
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