Flow field characteristics of flow past a rotating cylinder

Under the sub-critical condition with Re=1.4×105, flow past a rotating cylinder with uniform inflow is simulated numerically with Large Eddy Simulation (LES). The results are verified accurately through the comparison of the corresponding experimental and simulated results of the non-rotating case. Furthermore, flow past a rotating cylinder with different spin ratios (0≤α≤2, αis the ratio of the cylindrical circumferential speed to the free-stream speed). The numerical results show that the rotation of the cylinder can suppress vortex shedding effectively, and with the increase of spinning ratio, the mean drag coefficient of cylinder decreases while the lift coefficient increases. The amplitude of mean drag and lift coefficients become steady through a short transitional period for α=2. ©, 2015, China Ship Scientific Research Center. All right reserved.