不同入射角浅俯淹没射流水力特性试验研究

发布时间：2018-05-04 20:05

本文选题：浅俯淹没射流 + 跌坎消能工　；参考：《水动力学研究与进展(A辑)》2017年03期

【摘要】：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。
[Abstract]:In this paper, a shallow submerged jet with different incident angles is designed, and the hydraulic characteristics of 2-D axial flow field in a water cushion pond are studied experimentally. The distribution of the hydrodynamic pressure of the bottom plate with different incident angles, the distribution of the maximum velocity along the submerged jet zone and the zone of the jet sticking to the wall, the relation between the hydrodynamic pressure at the hysteresis point and its maximum bottom and the maximum near bottom velocity and the incident angle are obtained. The results show that the hydrodynamic pressure of shallow submerged jet with different incident angles on the bottom plate, especially in the half-extended length range of the impact zone, has a similar distribution law. When the incidence angle is greater than 25 掳, the submerged jet diffuses along the straight line of the incident angle, and when the incidence angle is less than 25 掳, the main section of the submerged jet deflects upstream under the action of the downstream swirl rolling and squeezing, and the hysteretic point with the maximum dynamic water pressure deviates upstream.
【作者单位】：中国电建集团中南勘测设计研究院有限公司;长沙理工大学水利工程学院;水沙科学与水灾害防治湖南省重点实验室;
【基金】：国家自然科学基金项目(50279040) 湖南省教育厅科学研究重点项目(2014A006) 水沙科学及水灾害防治湖南省重点实验室开放基金项目(2013SS06)~~
【分类号】：TV135

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