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-  2015 

闸孔出流水流特性数值模拟 Numerical simulation of flow characteristics of discharge under sluice gate

Keywords: 闸孔出流,重汇点,机械能损失,泄流能力

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Abstract:

闸门是一种控制水位和流量的建筑物,其出流特性与出流计算是工程水力学中颇为关注的问题.对淹没出流条件下冲刷坑形成过程中,闸孔出流的泄流能力、冲刷坑内水流流态及机械能的变化尚未开展研究,通过数值模拟对此进行了探讨,得到如下成果:1)在闸孔出流过程中,伴随着河床底部边界的变形及水跃的调整,过闸流量有变化但变化很小;2)在闸孔出流过程中,冲刷坑内的回流形态不断调整,重汇点位置也从冲刷坑形成初期的最大冲深位置下游不断回缩,直至与最大冲深位置相当;3)在闸孔出流过程中,伴随着河床底部冲刷的发展,闸门下游急变流段水流运动的总机械能损失是朝着减小的方向调整的,且机械能损失系数随冲刷时间不断减小趋于某一定值

References

[1]  Subhasish D,Bernhard W.Hydraulics of submerged Jet subject to change in cohesive bed geometry[J].Journal of Hydraulic Engineering,2003,129(1):44-53.
[2]  刘士和,刘江,罗秋实,等.工程湍流[M].北京:科学出版社,2011.
[3]  Liu S H,Yin S R.Turbulent flows around sand dunes in alluvial rivers[J].Journal of Hydrodynamics,2010,22(1):103-109.
[4]  Kim D G.Numerical analysis of free flow past a sluice gate[J].KSCE Journal of Civil Engineering,2007,11(2):127-132.
[5]  Subhasish D,Tushar K N,Sujit K B.Fully rough submerged plane wall-jets[J].Journal of Hydro-environment Research,2010,(4):301-316.
[6]  Liu S H,Xue J,Fan M.The calculation of mechanical energy loss for incompressible steady pipe flow of homogeneous fluid[J].Journal of Hydrodynamics,2013,25(6):912-918.
[7]  Lozano D,Mateos L,Merkley G P,et al.Field calibration of submerged sluice gates in irrigation canals[J].Journal of Irrigation and Drainage Engineering,2009,135(6):763-772.
[8]  Chatterjee S S,Ghosh S N,Chatterjee M.Local scour due to submerged horizontal jet[J].Journal of Hydraulic Engineering,1994,120(8):973-992.
[9]  Liu X F,Garcia M H.Three-dimensional numerical model with free water surface and mesh deformation for local sediment scour[J].Journal of Waterway,Port,Coastal,and Ocean Engineering,2008,134(4):203-217.
[10]  Liu S H,Fan M,Xue J.On the calculation of mechanical energy loss for steady flow of homogeneous incompressible in open channels[J].Journal of Hydrodynamics,2014,26(3):416-423.

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