Effect of yaw angle on the formation of vortex breakdown over the diamond wing [Elmas kanat modeli̇nde oluşan gi̇rdap çö kmesi̇ne sapma açisinin etki̇si̇]

In this study,the flow structure close to the surface of the non slender diamond wing was investigated both qualitatively and quantitatively using dye visualization and the 3-d particle image velocimetry (piv) technique. the flow structure and formation of the vortex breakdown were studied by varying the yaw angle of the wing within the range of 0°≤θ≤015° for the angle of attack of α=7° and reynolds number of 10 000. after a certain distance from the wing apex,a stagnation points and onset of vortex breakdowns took places on the central axes of spiral vortices that occurred over the wing surface for the angle of attack of α=7°. when the yaw angle was increased the locations of vortex breakdowns approached to the wing apex,but,the other one moves towards the trailing edge.© 2010 tib1d printed in turkey.