Numerical investigation of vortex-induced vibration of a circular cylinder with a hinged flat plate

The flow characteristics of the vortex-induced vibration of an elastically mounted circular cylinder with a hinged flat plate are investigated numerically in this study. By fixing the Reynolds number, the mass ratio, the damping ratio, and the plate length, we systematically examine the influence of the reduced velocities of cylinder and plate as well as the ratio of moment of inertia on the flow behaviors. With the help of the hinged plate, the cylinder vibration and the force fluctuations can be efficiently suppressed. Meanwhile, the drag force can also be reduced significantly compared to the situation of an isolated cylinder. Moreover, because of the large pitching angle of the hinged plate, smoother vortex shedding can be observed.