Experimental and numerical investigation of the influence of roughness and turbulence on LUT airfoil performance  

作　　者：Shoutu Li Ye Li Congxin Yang Xiaobo Zheng Qing Wang Yin Wang Deshun Li Wenrui Hu 

机构地区：[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,Lanzhou 730050,China [4]Lab of Multiple Function Towing Tank,School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China [5]State Key Laboratory of Ocean Engineering,School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China [6]Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration,Shanghai Jiao Tong University,Shanghai 200240,China [7]Key Laboratory of Hydrodynamics(Ministry of Education),Shanghai Jiao Tong University,Shanghai 200240,China [8]Institute of Mechanics,Chinese Academy of Sciences,Beijing 100080,China

出　　处：《Acta Mechanica Sinica》2019年第6期1178-1190,共13页力学学报（英文版）

基　　金：This work was supported by the Natural Science Foundation of GANSU(grant 1508RJYA098);National Natural Science Foundation of China(grants 51766009,51761135012,11872248);National Basic Research Program of China(grant 2014CB046201);The authors also thank the people who provided many good suggestions for this paper,and Northwestern Polytechnical University for providing the experimental instruments and wind tunnel.

摘　　要：Vertical-axis wind turbines(VAWTs)have been widely used in urban environments,which contain dust and experience strong turbulence.However,airfoils for VAWTs in urban environments have received considerably less research attention than those for horizontal-axis wind turbines(HAWTs).In this study,the sensitivity of a new VAWT airfoil developed at the Lanzhou University of Technology(LUT)to roughness was investigated via a wind tunnel experiment.The results show that the LUT airfoil is less sensitive to roughness at a roughness height of<0.35 mm.Moreover,the drag bucket of the LUT airfoil decreases with increasing roughness height.Furthermore,the loads on the LUT airfoil during dynamic stall were studied at different turbulence intensities using a numerical method at a tip-speed ratio of 2.Before the stall,the turbulence intensity did not considerably affect the normal or tangential force coefficients of the LUT airfoil.However,after the stall,the normal force coefficient varied obviously at low turbulence intensity.Moreover,as the turbulence intensity increased,the normal and tangential force coefficients decreased rapidly,particularly in the downwind region of the VAWT.

关 键 词：AIRFOIL Dynamic load ROUGHNESS Vertical-axis wind turbines(VAWTs) Wind tunnel experiment 

分 类 号：V21[航空宇航科学与技术—航空宇航推进理论与工程]