泄水建筑物侧墙突缩侧空腔水力特性研究
首发时间:2010-01-12
摘要:在前期研究的基础上,采用物理模型试验研究的方法,对明流泄水建筑侧墙突缩和底部突跌联合掺气情况下,探讨了侧空腔的影响因素和规律。结合模型试验结果分析得出,在侧墙突缩时,侧空腔的主要影响因素有:贴角坡度、跌坎高度和来流佛氏数。贴角坡度和来流佛氏数直接影响出坎水流的横向扩散能力,跌坎高度直接影响底板压力分布。侧空腔长度是出坎水流的横向扩散能力和底部落水区域压力分布的综合结果,落水区域压力分布对侧空腔长度形成起主要作用。
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Research Hydraulic Characteristics of spillway tunnel with sudden lateral contraction
Abstract:Based on the prior period research, the effect factors and regular pattern are discussed by model test method for the spillway tunnel aerator with sudden lateral enlargement and vertical drop. Experiential studies indicate that the main effect factors include the slope of fillet, the height of drop and the flow Froud number. The slope of fillet, the Froud number affect straightly the horizontal proliferation capacity of flow out of aerator, And the height of drop affect the pressure distribution of spillway floor. The length of lateral cavity is impacted by the horizontal proliferation capacity and the pressure distribution of spillway floor, and the latter plays a major role.
Keywords: Sudden lateral contraction Lateral Hydraulic characteristics
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No.3879129114126325****
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