DRAG REDUCTION OF AN UNIBUMPED AIRFOIL USING CFD

The work focuses on the improvement of aerodynamic characteristics by providing bumps on the upper surface of the airfoil. The investigation of an Eppler airfoil and fully bumped airfoil sections also carried out at low altitude, which generates stability disturbances over airfoil and the flow gets detached. This detachment of flow leads to increase in drag and reduces the lift generation. CFD analysis is carried out to investigate the effect of different angle of attack for the velocity 100 m/s. The result determined from this investigation shows that, the Coefficient of Lift in Unibumped airfoil increases with 6%-8% compared to Eppler airfoil and 3%-5% compared to Full Bumpy airfoil. Similarly Coefficient of Drag in Unibumped airfoil decreases to 5%-7% compared with Full Bumpy airfoil and increases with 1%-3% of Eppler airfoil.