长江科学院院报2011，Vol.28Issue(1)：34-38,5.
矩形渠道人工加糙壁面阻力规律试验研究
Experimental Study on Friction Law of Artificial Rough-Wall Rectangle Channel
摘要
Abstract
In order to analyze the friction law of the rectangle channel, this experimental research is carried out in an artificial rough-wall channel under three different roughness coefficients The experimental results indicate that,under an uniform flow, the roughness coefficient is not constant in the same roughness channel when the hydraulic condition changes. It increases logarithmically when the width-depth ratio of the channel increases, and decreases logarithmically when the flow increases, or decreases followed a power function when the Reynolds and Froude number increases, respectively. Meanwhile, the results show that different wall roughness has an obvious effect on the roughness coefficient, and then affects the hydraulic characteristics. Namely, water depth increases when the wall roughness increases, while mean velocity of flow and the Reynolds and Froude decrease under the same discharge condition. At last, the relation formula between roughness coefficient and equivalent roughness is given according to the experimental data.关键词
阻力规律/糙率系数/水力特性Key words
friction law/ roughness coefficient/ hydraulic characteristics分类
建筑与水利引用本文复制引用
杨岑,路泽生,栾维功,李建雄,吕宏兴,张宽地..矩形渠道人工加糙壁面阻力规律试验研究[J].长江科学院院报,2011,28(1):34-38,5.基金项目
国家973计划课题(2007CB407201) （2007CB407201）
国家自然科学基金重点项目(40335050) （40335050）
