Effects of strong turbulence structure coherent on load of blade root in a yaw wind turbine

doi:10.11975/j.issn.1002-6819.2020.20.013

	Effects of strong turbulence structure coherent on load of blade root in a yaw wind turbine
	Li, Deshun 1,2,3; Hu, Yuan 1; Li, Rennian 1,2,3; Guo, Tao 1; Dong, Yanbin 1; Li, Yinran 1,2,3; Wang, Qing 1,2,3
刊名	Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
	2020-10-15
卷号	36 期号:20 页码:102-109
关键词	Aerodynamics Dynamic loads Turbine components Turbulence Wind turbines Dynamic characteristics Kelvin-Helmholtz billows Load fluctuations Low frequency band National wind technology centers Turbulent coherent structures Wind turbine blade roots Wind turbine blades
ISSN号	10026819
DOI	10.11975/j.issn.1002-6819.2020.20.013
英文摘要	The strong turbulent wind has a significant impact on the dynamic load of wind turbine blade in a yaw state. Because the root of blade is the most stressed position, the dynamic characteristics of load are the key factors affecting the life and safe operation of wind turbine. In this study, the NWTCUP (The NREL National Wind Technology Center Model) wind spectrum model was used to couple KHB (Kelvin-Helmholtz Billow) flow, in order to construct a strong turbulent coherent structure wind condition. Subsequently, the FAST (Fatigue, Aerodynamics, Structures, and Turbulence) program was used to calculate the aerodynamic load of the NREL 1.5MW wind turbine under different yaw angles. Finally, the effect of KHB turbulent coherent structure was investigated on the dynamic load of wind turbine blade roots under yaw conditions. The results showed that the turbulent coherent structures increased the amplitude and energy of load fluctuations in a wind turbine. The increase of yaw angle has a smaller effect on the blade root edgewise moment, while a greater effect on the blade root flapwise moment, indicating the stronger dispersion of both factors. The turbulent coherent structure reduced the average value of blade root edgewise moment by 1.903%, while increased the average value of blade root flapwise moment by 2.906%. In Wavelet analysis of the root load, the turbulent coherent structure has a small effect on the energy of the edgewise moment, while, the energy was mainly concentrated in the low frequency band, corresponding to u'w', v'w'. There was a significant effect in terms of the leaf root flapwise moment, where the energy change corresponds well with u'w'. The energy of leaf root flapwise moment increased, as the yaw angle increased. © 2020, Editorial Department of the Transactions of the Chinese Society of Agricultural Engineering. All right reserved.
语种	中文
出版者	Chinese Society of Agricultural Engineering
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/151142]
专题	能源与动力工程学院
作者单位	1.School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Gansu Provincial Technology Centre for Wind Turbines, Lanzhou; 730050, China; 3.Key Laboratory of Fluid Machinery and Systems of Gansu Province, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Li, Deshun,Hu, Yuan,Li, Rennian,et al. Effects of strong turbulence structure coherent on load of blade root in a yaw wind turbine[J]. Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering,2020,36(20):102-109.
APA	Li, Deshun.,Hu, Yuan.,Li, Rennian.,Guo, Tao.,Dong, Yanbin.,...&Wang, Qing.(2020).Effects of strong turbulence structure coherent on load of blade root in a yaw wind turbine.Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering,36(20),102-109.
MLA	Li, Deshun,et al."Effects of strong turbulence structure coherent on load of blade root in a yaw wind turbine".Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering 36.20(2020):102-109.