INFLUENCE OF FLEXIBLE SUBMERGED VEGETATION ON FLOW CHARACTERISTICS IN OPEN CHANNEL

	INFLUENCE OF FLEXIBLE SUBMERGED VEGETATION ON FLOW CHARACTERISTICS IN OPEN CHANNEL
	Fan, Xinjian; Cui, Yixin; Lei, Peng; Lu, Yanan; Liu, Guangyao; Wang, Cheng
刊名	FRESENIUS ENVIRONMENTAL BULLETIN
	2021
卷号	30 期号:6 页码:6044-6052
关键词	Flexible submerged vegetation vegetation morphology the longitudinal time-average velocity turbulence intensity Quadrant analysis of Reynolds stress
ISSN号	1018-4619
英文摘要	Aquatic flexible submerged vegetation widely exists in natural rivers, lakes and beaches, which has a significant impact on flow structure and flow capacity of rivers, and plays an important role in ecological restoration. Therefore, it is very important to study the flow characteristics of open channel with vegetation. In this paper, the model plastic grass is used to replace the flexible submerged vegetation in natural river. Through the indoor high-precision flume test, three dimensional acoustic Doppler velocimeter was used to measure the flow characteristics of different forms of flexible submerged vegetation. The distribution characteristics of flow velocity, turbulence intensity and Reynolds stress quadrant variation rule of flexible submerged vegetation are obtained. The results show that the longitudinal time -average velocity decreases with the increase of flow rate along the way, and is less affected by vegetation morphology; along the course turbulence intensity increases with the increase of flow, and increases obviously with the increase of vegetation width to height ratio; the longitudinal velocity decreases with the increase of vegetation width to height ratio along the water depth; the contribution value of vegetation morphology to Reynolds stress in each quadrant is different, and the width of flexible submerged vegetation is larger. When the height is large, it can effectively restrain the scour of the riverbed and maintain the stability of the riverbed.
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	PARLAR SCIENTIFIC PUBLICATIONS (P S P)
WOS记录号	WOS:000665121000051
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148663]
专题	能源与动力工程学院
作者单位	Lanzhou Univ Technol, Coll Energy & Power Engn, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Fan, Xinjian,Cui, Yixin,Lei, Peng,et al. INFLUENCE OF FLEXIBLE SUBMERGED VEGETATION ON FLOW CHARACTERISTICS IN OPEN CHANNEL[J]. FRESENIUS ENVIRONMENTAL BULLETIN,2021,30(6):6044-6052.
APA	Fan, Xinjian,Cui, Yixin,Lei, Peng,Lu, Yanan,Liu, Guangyao,&Wang, Cheng.(2021).INFLUENCE OF FLEXIBLE SUBMERGED VEGETATION ON FLOW CHARACTERISTICS IN OPEN CHANNEL.FRESENIUS ENVIRONMENTAL BULLETIN,30(6),6044-6052.
MLA	Fan, Xinjian,et al."INFLUENCE OF FLEXIBLE SUBMERGED VEGETATION ON FLOW CHARACTERISTICS IN OPEN CHANNEL".FRESENIUS ENVIRONMENTAL BULLETIN 30.6(2021):6044-6052.