Onset of wake meandering for a floating offshore wind turbine under side-to-side motion

doi:10.1017/jfm.2021.1147

IMECH-IR > 非线性力学国家重点实验室

	Onset of wake meandering for a floating offshore wind turbine under side-to-side motion
	Li ZB(李曌斌); Dong GD(董国丹); Yang XL(杨晓雷)
通讯作者	Yang, Xiaolei(xyang@imech.ac.cn)
发表期刊	JOURNAL OF FLUID MECHANICS
	2022-01-18
卷号	934 页码:43
ISSN	0022-1120
摘要	Wind turbine wakes, being convectively unstable, may behave as an amplifier of upstream perturbations and make downstream turbines experience strong inflow fluctuations. In this work, we investigate the effects of the side-to-side motion of a floating offshore wind turbine (FOWT) on wake dynamics using large-eddy simulation and linear stability analysis (LSA). When the inflow turbulence intensity is low, simulation results reveal that the turbine motion with certain Strouhal numbers St = fD/U-infinity is an element of (0.2, 0.6) (where f is the motion frequency, D is the rotor diameter, and U-infinity is the incoming wind speed), which overlap with the Strouhal numbers of wake meandering induced by the shear layer instability, can lead to wake meandering with amplitudes being one order of magnitude larger than the FOWT motion for the most unstable frequency. For high inflow turbulence intensity, on the other hand, the onset of wake meandering is dominated by the inflow turbulence. The probability density function of the spanwise instantaneous wake centres is observed being non-Gaussian and closely related to that of the side-to-side motion. This complements the existing wake meandering mechanisms, that the side-to-side motion of an FOWT can be a novel origin for the onset of wake meandering. It is also found that LSA can predict the least stable frequencies and the amplification factor with acceptable accuracy for motion amplitude 0.01D. Effects of nonlinearity are observed when motion amplitude increases to 0.04D, for which the most unstable turbine oscillations shift slightly to lower frequencies and the amplification factor decreases.
关键词	wakes shear-flow instability
DOI	10.1017/jfm.2021.1147
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000744444300001
关键词[WOS]	LARGE-EDDY SIMULATION ; BOUNDARY-LAYER ; STABILITY ANALYSIS ; TUNNEL ; DYNAMICS ; AERODYNAMICS ; PITCH ; FARM
WOS研究方向	Mechanics ; Physics
WOS类目	Mechanics ; Physics, Fluids & Plasmas
论文分区	一类/力学重要期刊
力学所作者排名	1
RpAuthor	Yang, Xiaolei
引用统计	被引频次：19[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/311007/88406
专题	非线性力学国家重点实验室
推荐引用方式 GB/T 7714	Li ZB,Dong GD,Yang XL. Onset of wake meandering for a floating offshore wind turbine under side-to-side motion[J]. JOURNAL OF FLUID MECHANICS,2022,934:43.
APA	李曌斌,董国丹,&杨晓雷.(2022).Onset of wake meandering for a floating offshore wind turbine under side-to-side motion.JOURNAL OF FLUID MECHANICS,934,43.
MLA	李曌斌,et al."Onset of wake meandering for a floating offshore wind turbine under side-to-side motion".JOURNAL OF FLUID MECHANICS 934(2022):43.

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
Jp2022FA553_2022_Ons（2891KB）	期刊论文	出版稿	开放获取	CC BY-NC-SA	浏览下载