水平轴风力机桨叶二维增升实验研究

探讨了风力机通过在叶片上加襟翼来提高桨叶气动效率、增加功率可行性的实验研究。翼型选用在风力机中应用最多的NACA63

EXPERIMENTAL STUDY ON THEPOWER AUGMENTATION OF HORIZONTAL AXIS WIND TURBINE SYSTEM

The purpose of this paper is to disc uss the feasibilityexperimental research of the power and efficiency augmentati on of a horizontal axis wind turbine system by adding small flaps to its blades.Th e experiment of lift enhancement of a two-dimensional airfoil with a small trai ling edge flap was conducted at a low-speed,closed-loop wind tunnel at Shantou University.In experiment,the angles of attack varied from 0° to 40° and the h eights of the flaps were 1.0%,1.5%,2.0%,2.5% of the airfoil chord respective ly.The effects o f different deflective angles (45°，90°，135°)of the trailing edge flap were compared respectively.The lift and drag coefficients were determined from the su rface pressur e distributions,which were measured under all tested conditions.All results indi cated:all tested flaps could increase the lift coefficient and the larger flaps produced successively larger increments,though not proportionally.The Gurney fla p shows a superior performance compared with other angles trailing edge flaps.