合成射流对串列双圆柱涡致振动的控制效果OA

The effect of synthetic jets on the Vortex Induced Vibration(VIV)of two tandem circular cylinders was studied by numerical simulation.The effects of reduced velocity and the momentum co-efficient of the resultant jet on the shedding process,displacement amplitude and lift resistance of the downstream cylinder vortex were analyzed.In the study,the incoming Reynolds number Re=150,the position angle α=45°,and the spacing ratio is 4.The numerical results show that the horizontal synthetic jet can effectively suppress the vibration of the downstream cylinder and reduce the oscilla-tion amplitudes up to 80.48%.Under the control of the horizontal synthetic jet,the width between the two rows of trailing vortices shed by the downstream cylinder is obviously reduced.When the mo-mentum coefficient Cu increases from 2 to 4,the inhibition effect becomes more obvious.