부산대학교 도서관

In this research work, the investigation and optimization of Small Horizontal Axis Wind Turbine blade at low wind speed is pursued. In this paper, an optimized design method based on BEM Theory is explained applied to blade geometry for 0.20 m radius of wind turbine blades selected as ABS and PLA material. A Matlab and XFoil program was developed to use BEM theory and to developed new airfoil. The new airfoil is most suitable for low Reynolds number. The experimental blades were developed by using the 3D printing additive manufacturing technique. The Investigation and efficiency of the rotors has been done in an open wind tunnel, at blade angles of 15°, 30° and 45° respectively. The airfoils E216, S1221, SG6043, NACA2412, NACA4412 and NACA4415 were selected for the design of the single-airfoil blades tested at the rated wind speed of 2 m/s to 6 m/s. The airfoils were investigated with the aid of the XFoil software at Reynolds numbers of 0.5×105 and 1×105. The initial investigation range included tip speed ratios from 3 to 10 and angles of attack from 2° to 20°. Later on these parameters were varied in MATLAB and XFoil Software for optimization and investigation of the power coefficient, lift coefficient, drag coefficient and lift to drag ratio cut-in wind velocity of rotors is 2 m/s. [ABSTRACT FROM AUTHOR]