人民黄河Issue(11)：110-113,4.DOI:10.3969/j.issn.1000-1379.2014.11.033
不同直径比条件下同心环状缝隙流的水力特性
Cyclical Slit Flow of Concentricity Under Different Diameter Ratios
摘要
Abstract
In order to further explore the cyclical slit flow of concentricity under the moving boundary condition,the influence of the diameter ratio on cyclical slit flow of concentricity under the moving boundary condition were mainly analyzed by the combination of theoretical analysis and model experiments. The results show that,the cyclical slit flow average speed increases firstly and then decreases as the diameter ratio is enlarged and the maximum appears in 0. 6. The average flow velocity and the speed of the cylinder intersect at the optimum diameter ratio ke,and the difference is the smallest comparing with the average speed of pipe flow. Re =137094 and Re =205640,ke is between 0. 7 and 0. 8 and becomes larger as Re increases. Axial velocity increases firstly and then decreases and the pressure decreases firstly and then increases from the cylinder outer wall to pipeline inner wall when diameter ratios are 0. 5,0. 6 and 0. 7,however the axial velocity decreases and pressure increases gradually when diameter ratio is 0. 8. The max axial velocity and the min pressure move toward the cylinder outer wall with the increase of diameter ratio.关键词
环状缝隙流/最优直径比/轴向速度/动水压强Key words
cyclical slit flow/optimal diameter ratio/axial velocity/dynamic water pressure分类
建筑与水利引用本文复制引用
孙蕾,孙西欢,李永业,井元昊..不同直径比条件下同心环状缝隙流的水力特性[J].人民黄河,2014,(11):110-113,4.基金项目
国家自然科学基金资助项目（51109115，51179116）。 （）
