Large-eddy simulation on the similarity between wakes of wind turbines with different yaw angles

doi:10.1017/jfm.2021.495

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Large-eddy simulation on the similarity between wakes of wind turbines with different yaw angles
	Li ZB(李曌斌); Yang XL(杨晓雷)
刊名	JOURNAL OF FLUID MECHANICS
	2021-07
卷号	921 页码:A11
关键词	wakes turbulence simulation turbulent mixing
ISSN号	0022-1120
DOI	10.1017/jfm.2021.495
英文摘要	This work is dedicated to studying the similarity between wakes of wind turbines with different yaw angles and tip speed ratios under different turbulent inflows using large-eddy simulations with actuator surface models. Simulation results show that wake characteristics from cases with different yaw angles overlap with each other when normalized properly, which include the streamwise variations of the wake deflection, the centreline velocity deficit, the widths of the wakes, the standard deviations of instantaneous wake centre positions and the instantaneous wake widths. Different scalings are proposed for the streamwise velocity deficit and the transverse velocity. The similarities observed between cases with different yaw angles and the different scalings suggest that it is proper to -12ompose the wake of a yawed wind turbine into a streamwise wake and a lateral wake deflection, which is critical for developing analytical models. The mean of the instantaneous wake widths and the mean of the instantaneous centreline streamwise velocity are observed as being smaller than those of the time-averaged wake. These quantities are then related by using two analytical expressions proposed in this work. The observed similarities together with the proposed analytical expressions provide a better understanding of wakes of yawed wind turbines and can be employed to develop physics-based dynamic wake models.
学科主题	Mechanics ; Physics, Fluids & Plasmas
分类号	一类/力学重要期刊
语种	英语
WOS记录号	WOS:000667288900001
其他责任者	Yang, XL (corresponding author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China. ; Yang, XL (corresponding author), Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China.
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/90227]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Li ZB,Yang XL. Large-eddy simulation on the similarity between wakes of wind turbines with different yaw angles[J]. JOURNAL OF FLUID MECHANICS,2021,921:A11.
APA	李曌斌,&杨晓雷.(2021).Large-eddy simulation on the similarity between wakes of wind turbines with different yaw angles.JOURNAL OF FLUID MECHANICS,921,A11.
MLA	李曌斌,et al."Large-eddy simulation on the similarity between wakes of wind turbines with different yaw angles".JOURNAL OF FLUID MECHANICS 921(2021):A11.