A sluice structure with multiple gates is often followed by an enlarging channel downstream. Experiments are conducted for different enlargement ratios in cross-section and Froude numbers at the gates. A large-scale PIV system is adopted to capture the surface flow field for examination of the flow features. The study shows that, despite the centrally placed sluice structure with symmetric outflow, a hydraulic jump occurs and the main flow downstream exhibits, in terms of expansion and deflection, a high degree of asymmetry and formation of large circulation zones. The degree of deflection increases significantly along the longitudinal direction for all the enlargement ratios except the smallest. The toe of the hydraulic jump is controlled at the upper edge of the sloping surface downstream of the gates. In light of outflow width, Froude number and enlargement ratio, the flow is classified into three regions. Immediately downstream, the effect of outflow width gradually decreases with increasing Froude number. Further downstream, the degree of deflection augments with increasing enlargement ratio, with circulation zones. At a given cross-section, the degree of expansion is positively related to the enlargement ratio. The study is expected to provide guidance for examination of similar issues of flow pattern and erosion protection design.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Flow Expansion and Deflection Downstream of a Symmetric Multi-gate Sluice Structure


    Additional title:

    KSCE J Civ Eng


    Contributors:
    Chen, Yuejun (author) / Yang, James (author) / Yu, Jianzhong (author) / Fu, Zongfu (author) / Chen, Qingsheng (author)

    Published in:

    Publication date :

    2020-02-01


    Size :

    12 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Flow Downstream Sluice Gate with Orifice

    Mohamed, Ibrahim M. / Abdelhaleem, Fahmy S. | Springer Verlag | 2020


    Scouring Downstream of Sluice Gate

    Lim, Siow-Yong / Yu, Guoliang | HENRY – Federal Waterways Engineering and Research Institute (BAW) | 2002

    Free access

    SLUICE GATE

    LEE MISUK / CHOI NURI / CHOI SORI | European Patent Office | 2023

    Free access

    Turbulent flow in the scour hole downstream of a sluice gate: erosion induced by Görtler vortices

    Rodriguez, Boris / Escauriaza, C. | HENRY – Federal Waterways Engineering and Research Institute (BAW) | 2010

    Free access

    Numerical analysis of free flow past a sluice gate

    Kim, Dae-Geun | Springer Verlag | 2007