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该文设计不同入射角的浅俯淹没射流,对水垫塘中轴面二维流场的水力特性开展试验研究,得到了不同入射角的底板动水压强分布规律和淹没射流区及贴壁射流区的最大流速沿程分布,滞点及其最大底板动水压强和最大近底流速与入射角间的关系式。研究结果表明,不同入射角的浅俯淹没射流作用在底板上的动水压强,尤其在冲击区半扩展长度范围,具有相似的分布规律。入射角大于25°时,淹没射流沿入射角直线扩散;入射角小于25°时,淹没射流主体段在下游漩滚挤压作用下向上游偏转,动水压强最大的冲击滞点偏向上游。
In this paper, shallow jet submerged jets with different incident angles are designed to study the hydraulic characteristics of the two-dimensional flow field in the axial plane of the plunge pool. The dynamic pressure distribution law and the submerged jet zone and the adherent jet The distribution of the maximum velocity of the zone, the relationship between the stagnation point, the maximum hydrodynamic pressure of the bottom plate and the maximum near bottom flow velocity and the incident angle. The results show that the hydrodynamic pressure of the submerged submerged jets with different incident angles on the bottom plate has a similar distribution, especially in the semi-extended length of the impact zone. When the incident angle is greater than 25 °, the submerged jet will be linearly diffused along the incident angle. When the incident angle is less than 25 °, the submerged jet will deflect upstream under the influence of downstream swirling extrusion.