Abstract
Changes in flow caused by flow reattachment on the side surface of a freestream-aligned circular cylinder depend not only on fineness ratio, but also on angle of attack (AoA), which significantly affects the aerodynamics. In this study, the aerodynamic forces on the cylinder and flow fields are investigated in wind tunnel tests under the flow without support interference using a magnetic suspension and balance system (MSBS) and PIV measurements. The AoA where flow reattachment starts to appear is identified, and two flow regimes are observed in the 0-15 degree range. The difference in the time-averaged and fluctuating aerodynamic force due to the flow regime change also appears.
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