Abstract:In order to obtain the aerodynamics of the circular cylinder in subcriticaltosupercritical flow regime, the large eddy simulations (LES) with the smagorinsky subgrid scale and dynamic subgrid scale models are respectively employed to predict the flow field where Re is from 4.1×104~8.2×105. The obtained steady and unsteady aerodynamics are compared with available data in other references. The results show that both subgrid scale models provide reasonable estimation on mean and RMS lift coefficients, vortex shedding St number and drop of drag coefficients. However, the drag crisis in critical regime is not accurately predicted, but reasonable estimation on mean and RMS pressure distribution around the cylinder is obtained. In critical and supercritical regimes, the smagorinsky subgrid scale model may overestimate the subgrid turbulent viscosity, while the dynamic subgrid scale model may significantly underestimate the subgrid turbulent viscosity in some areas of the flow field.