长江科学院院报2011，Vol.28Issue(9)：1-5,5.
渐变河道水流结构及局部水头损失特性研究
Flow Structure and Characteristics of Local Head Loss in Transition Channel
摘要
Abstract
The gradual change of transition channel width is a common form of natural rivers. The flow structure of transition channel was measured in the physical model by Acoustic Doppler Velocimeter (ADV). It is manifested that the flow was influenced remarkably by the streamwise velocity. Secondary circulation was induced in the gradually shrinked section and in the gradually expanded section, with the circulation effect in the former greater than the latter in an opposite direction. According to the 2-D flow simulation by SMS hydrodynamic model, the coefficient of local head loss was proved to be consistent with the measured value, and the coefficient values at flow separation zone were times larger than that in other regions.关键词
渐变河道/水流结构/SMS/局部水头损失系数Key words
transition channel/ flow structure/ SMS/ coefficient of local head loss分类
建筑与水利引用本文复制引用
闫旭峰,易子靖,刘同宦,刘兴年,王协康..渐变河道水流结构及局部水头损失特性研究[J].长江科学院院报,2011,28(9):1-5,5.基金项目
国家自然科学基金项目(40771022,507390002) （40771022,507390002）
