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该文以某弧形闸门控制的泄洪闸为研究对象,采用比尺为1:20的水工模型试验,对弧形闸门前的旋涡特性及其临界淹没水深进行了研究。试验观测发现,弧形闸门局部开启时,闸门前旋涡总是成对出现的,且环量方向相反。实测吸气旋涡的临界淹没水深数据表明,其不仅与弗劳德数有关,还与进水口的宽高比以及来流收缩比有关。最后该文通过理论分析和数据拟合的方法,建立了避免弧形闸门前形成吸气旋涡的临界淹没水深公式,该公式同时考虑了弗劳德数、闸门开度和来流环量的影响。
In this paper, a sluice gate controlled by an arc gate is taken as the research object. The hydraulic model test with a scale ratio of 1:20 is used to study the vortex characteristics and critical submerged depth in front of an arc gate. Experimental observations show that when the radial gate is partially opened, the front vortices of the gate always appear in pairs, and the directions of the toroidal forces are opposite. The critical submerged depth of the measured inspiratory vortices shows that it is not only related to the Froude number, but also to the aspect ratio of the inlet and the ratio of incoming flow contraction. In the end, by means of theoretical analysis and data fitting, a critical submerged depth formula to avoid the formation of inspiratory vortex before the arc gate is established. The formula also considers the effects of Froude number, gate opening and the amount of flow around the gate .