Critical stokes number for gas-solid flow erosion of wind turbine airfoil

	Critical stokes number for gas-solid flow erosion of wind turbine airfoil
	Li, Deshun 1,2,3; Gong, Yuxiang 2; Li, Rennian 1,2,3; Li, Yinran 1,2,3; Ma, Ruijie 2
刊名	Transactions of Nanjing University of Aeronautics and Astronautics
	2016-02-01
卷号	33 期号:1 页码:67-72
关键词	Airfoils Angle of attack Erosion Sand Turbomachine blades Two phase flow Wind turbines Airfoil surfaces Gas solid two phase flow Gas-solid flows Particle Stokes number Relative thickness Stokes number Wind turbine airfoils Wind turbine blades
ISSN号	10051120
英文摘要	Wind turbine blades are inevitable to be eroded in wind-sand environment, so it is crucial to identify the flow conditions under which the erosion happens. Here, the effect of the sand diameter on wind turbine airfoil is first investigated. When the sand diameter is less than 3 μm, the sands will bypass the airfoil and no erosion occurs.When the sand diameter is larger than 4 μm, the sand grains collide with the airfoil and the erosion happens. Thus, there must be a critical sand diameter between 3 μm and 4 μm, at which the erosion is initiated on the airfoil surface. To find out this critical value, a particle Stokes number is introduced here. According to the range of the critical sand diameter mentioned above, the critical value of particle Stokes number is reasonably assumed to be between 0.0078 and 0.014. The assumption is subsequently validated by other four factors influecing the erosion, i.e., the angle of attack, relative thickness of the airfoil, different series airfoil, and inflow velocity. Therefore, the critical range of Stokes number has been confirmed. © 2016, Nanjing University of Aeronautics an Astronautics. All right reserved.
语种	英语
出版者	Nanjing University of Aeronautics an Astronautics
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/113407]
专题	能源与动力工程学院新能源学院
作者单位	1.Gansu Provincial Technology Centre for Wind Turbines, Lanzhou; 730050, China; 2.School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 3.Key Laboratory of Fluid Machinery and Systems, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Li, Deshun,Gong, Yuxiang,Li, Rennian,et al. Critical stokes number for gas-solid flow erosion of wind turbine airfoil[J]. Transactions of Nanjing University of Aeronautics and Astronautics,2016,33(1):67-72.
APA	Li, Deshun,Gong, Yuxiang,Li, Rennian,Li, Yinran,&Ma, Ruijie.(2016).Critical stokes number for gas-solid flow erosion of wind turbine airfoil.Transactions of Nanjing University of Aeronautics and Astronautics,33(1),67-72.
MLA	Li, Deshun,et al."Critical stokes number for gas-solid flow erosion of wind turbine airfoil".Transactions of Nanjing University of Aeronautics and Astronautics 33.1(2016):67-72.