Influence of blade leading edge erosion features on aerodynamic characteristics of wind turbine airfoil

doi:10.11975/j.issn.1002-6819.2017.22.035

	Influence of blade leading edge erosion features on aerodynamic characteristics of wind turbine airfoil
	Li, Deshun 1,2,3; Wang, Chengze 1,4; Li, Yinran 1,2,3; Li, Rennian 1,2,3; Zhao, Zhenxi 1; Chen, Xia 1
刊名	Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering
	2017-11-15
卷号	33 期号:22 页码:269-275
关键词	Airfoils Computer simulation Deterioration Drag Drag coefficient Erosion Flow separation Geometry Lift Lift drag ratio Numerical models Turbomachine blades Turbulence models Wear of materials Wind power Wind turbines Aerodynamic characteristics Airfoil aerodynamics Flow field characteristics K-Omega turbulence model Leading edge erosion feature Natural environments Wind turbine airfoils Wind turbine blades
ISSN号	10026819
DOI	10.11975/j.issn.1002-6819.2017.22.035
英文摘要	Because wind turbine blades are exposed to complex natural environment for a long time, as time goes on, rain, snow, dust and other particles will gradually erode the surface of blade, then causing the erosion on the blade surface, especially at the leading edge of the blades, which is the area with the most serious wear. With wind turbine running time increasing, under the impact of various complex particles, the erosion process on wind turbine blades typically starts with the formation of small pits at the leading edge, which quickly develop into gouges with larger size and deeper depth, and then the increasing pits and gouges eventually lead to the fact that material of the leading edge falls off largely, forming delamination. In order to simulate the leading edge erosion of wind turbine as accurately as possible, a geometric model which is close to the actual wear profile was established and a mathematical model which is suitable for airfoil calculation was selected. According to the erosion features on leading edge of wind turbine blade operating in actual wind farm, the leading edge of DU96-W-180 airfoil profile was modified to study the effects of aerodynamic characteristics caused by leading edge erosion on wind turbine blades. At the same time, a geometric model was built and numerical simulations were performed to solve the RANS equation based on SST k-ω turbulence model. Lift force, drag force and flow field characteristics of the erosion airfoil were analyzed. And then the conclusions were drawn. In the situation that leading edge erosion is characterized by pits and gouges, the coefficients of lift and drag have a small change, and as the attack angle increases, the lift coefficient and lift-drag ratio decrease slightly, and the drag coefficient increases slightly. The influence of leading edge delamination is notable, especially under the situation of high attack angle, and the lift coefficient and lift-drag ratio are significantly reduced and the drag coefficient is sharply enlarged with the increase of the attack angle, and this change becomes more notable with the increase of erosion. The leading edge erosion intensifies the flow separation near the trailing edge of the airfoil suction surface, and makes the separation point move forward. The phenomenon of separation is more and more obvious as the degree of wear and tearing is gradually deepening, and the eddy forms after separation gradually becomes larger, resulting in the fact that lift reduces and resistance increases. Pits and gouges have small influence on the flow near the airfoil leading edge. On the contrary, delamination leads to the step-flow around the airfoil surface, and air bypasses the step with separating flow, and then adheres to the airfoil surface again, so the delamination has a significant impact on the flow near the leading edge, which leads to the deterioration of airfoil aerodynamic performance. © 2017, 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/114891]
专题	能源与动力工程学院兰州理工大学
作者单位	1.College 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, Lanzhou; 730050, China; 4.XEMC Windpower Co. Ltd., Xiangtan; 411101, China
推荐引用方式 GB/T 7714	Li, Deshun,Wang, Chengze,Li, Yinran,et al. Influence of blade leading edge erosion features on aerodynamic characteristics of wind turbine airfoil[J]. Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering,2017,33(22):269-275.
APA	Li, Deshun,Wang, Chengze,Li, Yinran,Li, Rennian,Zhao, Zhenxi,&Chen, Xia.(2017).Influence of blade leading edge erosion features on aerodynamic characteristics of wind turbine airfoil.Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering,33(22),269-275.
MLA	Li, Deshun,et al."Influence of blade leading edge erosion features on aerodynamic characteristics of wind turbine airfoil".Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering 33.22(2017):269-275.