Air concentration and velocity downstream of an expanding chute aerator

doi:10.1080/00221686.2017.1372819

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 > 山地表生过程与生态调控重点实验室

	Air concentration and velocity downstream of an expanding chute aerator
	Li, Shuai1,2,3 ; Zhang, Jianmin 4; Chen, Xiaoqing1,2,3 ; Zhou, Gordon G. D.1,2,3
刊名	JOURNAL OF HYDRAULIC RESEARCH
	2018
卷号	56 期号:3 页码:412-423
关键词	Air concentration air-water flows sudden expansion-fall aerator turbulent diffusion velocity distribution
ISSN号	0022-1686
DOI	10.1080/00221686.2017.1372819
英文摘要	The mechanisms of air entrainment and velocity distribution at the upper, lower and side air-water interfaces downstream of chute aerators remain unclear. This study reports a series of experiments involving various approach-flow features and geometric parameters of aerators. Analytical solutions are developed for the air concentration profiles in the air-water layers, and it is shown that the solutions agree well with the experiments. Empirical equations are established for the turbulent diffusion of bubbles and the diffusion rate of the aeration layer. The turbulent diffusion coefficient of the lower nappe is found to be approximately 10 times and 1.2-1.8 times larger than those of the upper and side nappes, respectively. The diffusion rate of the aeration layer is the highest at the lower nappe and lowest at the upper nappe, gradually decreasing along the cavity. The velocity distribution indices are found to be different for the upper, lower and side nappes.
语种	英语
出版者	TAYLOR & FRANCIS LTD
WOS记录号	WOS:000435691900009
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/23339]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
通讯作者	Zhang, Jianmin
作者单位	1.Chinese Acad Sci, Key Lab Mt Hazards & Earth Surface Proce, Chengdu, Sichuan, Peoples R China 2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Sichuan, Peoples R China 3.Minist Water Conservancy & Power, Chengdu 610041, Sichuan, Peoples R China 4.Sichuan Univ, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Sichuan, Peoples R China
推荐引用方式 GB/T 7714	Li, Shuai,Zhang, Jianmin,Chen, Xiaoqing,et al. Air concentration and velocity downstream of an expanding chute aerator[J]. JOURNAL OF HYDRAULIC RESEARCH,2018,56(3):412-423.
APA	Li, Shuai,Zhang, Jianmin,Chen, Xiaoqing,&Zhou, Gordon G. D..(2018).Air concentration and velocity downstream of an expanding chute aerator.JOURNAL OF HYDRAULIC RESEARCH,56(3),412-423.
MLA	Li, Shuai,et al."Air concentration and velocity downstream of an expanding chute aerator".JOURNAL OF HYDRAULIC RESEARCH 56.3(2018):412-423.