The investigation of different wing-lets impact on Wing tip vortex

In the present study, the formation of the wing-tip vortex from a rectangular NACA0015 wing with a square tip at Re (Reynolds number) = 2.0x105 and AOA (angle of attack) = 15° were simulated, with a Spalart-Allmaras turbulence model by using of ANSYS FLUENT. Numerical results showed that the wing-lets can break up tip vortex effectively and increase the Lift coefficient, reduce the Drag coefficient. The present study suggested that under the same calculation cost, the most excellent achievement was grasped with three wing-lets on NACA0015 airfoil at AOA=-15°, the vorticity and drag coefficient reduced by 75% and 9%, respectively, and lift coefficient increased about 27%.