| Cite this article: | 胡亚卓,拾兵.琴键堰在水利界的研究与应用现状[J].灌溉排水学报,2020,(Z1):-. |
| huyazhuo,shibing.琴键堰在水利界的研究与应用现状[J].灌溉排水学报,2020,(Z1):-. |
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| DOI： |
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| Status of Research and Application fo Piano key Weir in Hydraulic Engineering |
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huyazhuo1, shibing2
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1.Ocean University of China;2.College of Engineering, Ocean University of China
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| Abstract: |
| The research results and application of the flow characteristics, hydraulic characteristics, important parameters affecting the hydraulic characteristics, structural design and construction of the piano key weir, as well as the piano keys are systematically summarized and reviewed in this article. Problems such as siltation upstream of the weir, impact of energy dissipation and scouring downstream and construction of piano key weir in the dam valley are discussed. To date, all of the key weirs that have been built were studied using physical proportional models. Numerical simulations may be able to reproduce the complex flow conditions at its downstream of the key weir with acceptable accuracy, which can be used to verify downstream structural design or study energy dissipation. However, because of the lack of systematic experimental research and detailed data on the flow conditions at its downstream of the piano weir, its development and verification of suitable numerical models is hindered respectively. Therefore, it will be recommended to carry out further research in this field. |
| Key words: piano-key weir; flow characteristics; hydraulic characteristics; over-discharge ratio; energy dissipation and scouring |
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