不同入射角浅俯淹没射流水力特性试验研究  

Research on hydraulic characteristics of shallow submerged jet with different incidence angles

作　　者：张春财[1,2,3] 王立杰 戴晓兵 赵润达 

机构地区：[1]中国电建集团中南勘测设计研究院有限公司,长沙410014 [2]长沙理工大学水利工程学院,长沙410114 [3]水沙科学与水灾害防治湖南省重点实验室,长沙410114

出　　处：《水动力学研究与进展（A辑）》2017年第3期358-364,共7页Chinese Journal of Hydrodynamics

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)~~

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。Shallow submerged jet with different incidence angles were designed to carry out the experimental study on the hydraulic characteristics of plunge pool axial surface in two-dimensional flow field, distribution rules of slab hydrodynamic pressure, distribution of maximum velocity in submerged jet zone and wall-attached jet zone were obtained. Relationships between position of stagnation point, maximum hydrodynamic pressure, near-bed velocity and incidence angles were derived. The results showed that bottom hydrodynamic pressure of shallow submerged jet with different incidence angles, especially in the range of half extended length, there were similar distribution law. When incidence angle was more than 25°, submerged jet diffused straightly along incidence angle. When incidence angle was less than 25°, main section of submerged jet deflected toward upstream and stagnation point deviated to upstream.

关 键 词：浅俯淹没射流 跌坎消能工 水垫塘 动水压强 近底流速 

分 类 号：TV135.23[水利工程—水力学及河流动力学]