The vortex shedding characteristics for laminar incompressible flows past an abruptly started elliptic cylinder at various angles of attack are investigated by numerical methods. The governing equations in terms of the vorticity and stream function are solved using DuFort-Frankel scheme and line successive over-relaxation procedure.
For Re=500, no shedding occurs at angle of attack of 15˚, whereas at angles of attack of 22.5˚, and 30˚, apparently occurs the shedding, and the phenomena are very similar for both angles of attack. However, the onset of them are different for the two cases.
It is considered that the onset and process of vortex shedding is related to Reynolds number, angle of attack and geometry of bodies. Especially the onset of vortex shedding is largely affected by angle of attack.
