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

doi:10.1017/jfm.2021.495

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	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)
发表期刊	JOURNAL OF FLUID MECHANICS
	2021-07
卷号	921 页码:A11
ISSN	0022-1120
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.
关键词	wakes turbulence simulation turbulent mixing
学科领域	Mechanics ; Physics, Fluids & Plasmas
DOI	10.1017/jfm.2021.495
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000667288900001
论文分区	一类/力学重要期刊
力学所作者排名	1
RpAuthor	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.
引用统计	被引频次：37[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/90227
专题	非线性力学国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, 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.

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