长江科学院院报Issue(7)：1-4,4.DOI:10.3969/j.issn.1001-5485.2015.07.001
泄水闸堰前冲刷机理及减淤措施研究
Mechanism of Scouring and Measures of Reducing Sedimentation in front of Sluice Gate
摘要
Abstract
The bulkhead gate of low-head navigation-power junction could not open and close normally because of sediment deposition in the upstream of weir,affecting the inspection and maintenance of sluice gate.In view of this,we established movable-bed physical model and 3D mathematical model of sluice gate to analyze the three di-mensional flow field and turbulent kinetic energy distribution in the upstream of the gate.We also observed the scouring effect in the presence of different operation modes of the gate.Results suggest that sediment’s incipient motion is not only related with the flow velocity at gate bottom,but also affected by the flow pattern and turbulence intensity in front of the gate.It is also affected by the increase of turbulent kinetic energy.When the outlets of gate were opened in intervals,vortexes were formed near the gate wall,and complex three-dimensional flow patterns oc-curred in front of the gate.In this case better scouring effect can be achieved than that when sluice gate is opened continuously.关键词
泄水闸/淤积防治/调度冲淤/下潜水流/冲刷机理Key words
sluice gate/sedimentation control/scheduling of erosion and deposition/phreatic flow/erosion mecha-nism分类
建筑与水利引用本文复制引用
刘晓平,黄琼,张宇,苏冠华..泄水闸堰前冲刷机理及减淤措施研究[J].长江科学院院报,2015,(7):1-4,4.基金项目
湖南省交通厅科技创新项目 （）
