Analysis of Pressure Change on the Splitter Plate in Flow Over a Circular Cylinder

Two-dimensional unsteady laminar flow over a circular cylinder with an attached splitter plate was investigated numerically. In order to see the effect of inclination angle on the pressure distribution around the splitter plate, numerical simulations were performed at moderate Reynolds numbers ranging from 100 to 500. The length of splitter plate is equal to the diameter of the circular cylinder and the inclination angle between the splitter plate and the wake centerline was changed from 0 to 45 deg. The simulation results show that the inclination angle of the splitter plate causes important changes in pressure distribution on the surface of the splitter plate. The forces on the both sides of the splitter plate periodically vary with the time. The change of the inclination angle causes an observable variation in the force coefficient C_s of the splitter plate. A local peak is produced by the change of the angle of splitter plate and attained at approximately 15 deg. When the angle is larger than 20 deg, the RMS value of C_s increases while the inclination angle increases.