弧形闸门前消涡隔栅试验研究

发布时间：2018-03-01 20:29

本文关键词： 闸前漩涡模型试验消涡隔栅弧形闸门　出处：《水力发电学报》2017年01期 　论文类型：期刊论文

【摘要】：闸前漩涡是水利工程中常见水流现象,本文通过模型试验和理论分析的方法,采用竖向布置的消涡隔栅对弧形闸门前的漩涡进行了消涡研究。共设计了三种布置方案,分别在闸门迎水面上竖向设置一对、两对和三对消涡隔栅,研究不同开度下,消涡隔栅布置位置、隔栅宽度及隔栅数量对消涡效果的影响。研究表明,竖向布置的消涡隔栅限制了漩涡的旋转回流空间,使漩涡因"伸展不开"而湮灭于水面或缩小为半径较小的漩涡,从而使吸气漩涡区减小,达到消涡目的;三种布置方案中,采用两对消涡隔栅时消涡效果最好;隔栅布置位置和隔栅宽度对消涡效果的影响较大,消涡隔栅布置的最佳位置与闸门宽度有关,消涡隔栅的宽度越大消涡效果越好,但是消涡隔栅宽度的确定还需考虑闸门开度以及实际工程运行工况。本文的研究成果能够为实际工程中泄洪闸门前的漩涡消除提供借鉴。
[Abstract]:The vortex in front of sluice is a common water flow phenomenon in hydraulic engineering. In this paper, the vortex suppression in front of arc gate is studied by means of model test and theoretical analysis, and three layout schemes are designed. A pair, two pairs and three pairs of vortex barrier are arranged vertically on the water face of the gate respectively. The effects of the location, width and number of the barrier on the effect of vortex elimination are studied under different opening. The vertical arrangement of the vortex barrier limits the whirlpool's rotating reflux space and causes the vortex to annihilate on the surface of the water or to be reduced to a vortex with a smaller radius because of the "stretch not open", thus reducing the region of the inspiratory vortex to achieve the purpose of eliminating the vortex; in the three arrangement schemes, The effect of vortex elimination is best when two pairs of vortex barrier are adopted, and the location and width of the grid have great influence on the effect of vortex elimination. The optimum position of the grid is related to the gate width, and the larger the width of the vortex barrier is, the better the effect of vortex elimination is. However, the determination of the width of the vortex barrier still needs to consider the opening of the gate and the operating conditions of the actual project. The research results in this paper can provide a reference for the elimination of the vortex in front of the floodgate in the actual project.
【作者单位】：大连理工大学建工学部水利学院;
【基金】：国家自然科学基金(51479022;51179021)
【分类号】：TV663.2

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