부산대학교 도서관

The present paper carries a numerical and experimental study of vortex generators equipped at different positions in the airfoil DU17-BDB-25-320 . Vortex generators have become an important passive flow control method due to its simplicity and performance. This project compiles a detailed study of this flow control technique in both static conditions and undergoing pitch oscillations. The discussion of the present investigation consists in the effect of vortex generator in the aerodynamic coefficients of the airfoil, the ability to delay stall and the effect in the hysteresis intensity under pitch oscillations. For this purpose, the airfoil is tested numerically in the CFD commercial package ANSYS Fluent 19.1 and experimentally in the low turbulence wind tunnel LTT at TU Delft. The cases are operated in static conditions at different angles of attack with and without vortex generators and unsteady conditions at both quasi-steady and unsteady reduced frequencies. In addition, the numerical simulations are modelled with turbulent URANS equations k-omega SST, and compared with the experimental tests in forced transition. *****The present paper carries a numerical and experimental study of vortex generators equipped at different positions in the airfoil DU17-BDB-25-320 . Vortex generators have become an important passive flow control method due to its simplicity and performance. This project compiles a detailed study of this flow control technique in both static conditions and undergoing pitch oscillations. The discussion of the present investigation consists in the effect of vortex generator in the aerodynamic coefficients of the airfoil, the ability to delay stall and the effect in the hysteresis intensity under pitch oscillations. For this purpose, the airfoil is tested numerically in the CFD commercial package ANSYS Fluent 19.1 and experimentally in the low turbulence wind tunnel LTT at TU Delft. The cases are operated in static conditions at different angles of att