Experimental Study of Wake Characteristics on an Asymmetric Airfoil Using Tripping Wires

The effect of installation of turbulence promoter wire on the wake flow characteristics such as average velocity and turbulence intensity about an airfoil is investigated experimentally at a Reynolds number of 3780. The wire is installed at the maximum thickness of NACA0012 airfoil and its diameter is changed to obtain different turbulente flows. This study shows that the width and minimum of velocity profile in the wake is increased by increasing the wire diameter. Also by increasing x/c and the wire diameter, the half width at half depth (b1/2) is increased. The velocity outside of wake region is approximately equal for all cases. This investigation also shows that the drag coefficient is increased by increasing the wire diameter.