Effects of river width changes on flow characteristics based on flume experiment

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2016 > Vol13 No.2

	Effects of river width changes on flow characteristics based on flume experiment
	WANG Xie-kang; WANG Bing-jie; LIU Xing-nian; Zhang Li-qiong
刊名	Journal of Mountain Science
	2016-02
卷号	13 期号:2 页码:361-368
关键词	Gradual channel transition Flow pattern Experimental study Numerical simulation
ISSN号	1672-6316
通讯作者	WANG Xie-kang
英文摘要	The rapid changes in flow pattern due to varying channel widths will make significantly impact on the hydraulic structures and evolutions of open channel. To better understand the impact of varying width, a flume experiment with adjustable width and a depth-averaged two-dimension numerical model were used to analyze the variations of flow parameters. Our experimental results showed that flow velocity gradually increased with decreasing water depth in converging region, and decreased with increasing water depth in diverging zones. It was also found that the turbulence intensity laws in three directions were not agreed with the theoretical relationships proposed by Nezu and Nakagawa in 1993 in straight open channel flows. The flow in the channel with varying width may change from the supercritical flow to the subcritical flow as a function of Froude number. Our numerical simulations with different flow rates showed that most of the hydraulic jumps in diverging region were submerged jump and the degree of submergence increased with increasing flow rate in gradual channel transition. When the flow rate increased, the range of supercritical flow rapidly decreased and the flow changed from the supercritical condition to the subcritical condition in diverging sections.
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/14081]
专题	成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2016_Vol13 No.2
推荐引用方式 GB/T 7714	WANG Xie-kang,WANG Bing-jie,LIU Xing-nian,et al. Effects of river width changes on flow characteristics based on flume experiment[J]. Journal of Mountain Science,2016,13(2):361-368.
APA	WANG Xie-kang,WANG Bing-jie,LIU Xing-nian,&Zhang Li-qiong.(2016).Effects of river width changes on flow characteristics based on flume experiment.Journal of Mountain Science,13(2),361-368.
MLA	WANG Xie-kang,et al."Effects of river width changes on flow characteristics based on flume experiment".Journal of Mountain Science 13.2(2016):361-368.