A Study on the Lift and Drag Characteristics of a Wing with Non-uniform Blowing from Lower Surface

Non-uniform blowing effect for a wing was studied to enhance aerodynamic performance of the wing which is subjected to wind shear during take-off & landing. Wind shear was simulated by a uniform flow impinging on the model, normal to the free stream. Rectangular wing models were designed and a wind tunnel tests were conducted to investigate the aerodynamic characteristics of the wings with non-uniform blowing from its lower surface. In this study, the experimental data were measured for the wing with and without non-uniform blowing in the wind tunnel. Selected data at several test conditions varying blowing location, blowing angles and jet momentum coefficient are discussed to find lift and drag coefficient trends. The experimental results showed that the wing with non-uniform blowing from lower surface has a higher lift to drag ratio than the wing without blowing and maximum lift to drag ratio is increased by 39% for a rectangular wing compared to the basic wing without blowing and also increase the lift to drag ratio reduced by simulated wind shear.