Abstract
The aerodynamic force and pressure distribution on a cantilevered cylinder with aspect ratio of 5 mounted in smooth uniform oncoming flow and turbulent boundary layer have been experimentally investigated. The tested Reynolds number ranges from 0.64×105 to 5.81×105, covering subcritical, critical and supercritical regimes. The results indicate that the aerodynamic drag of a cantilevered cylinder is smaller that that of 2D cylinder. The drag differs significantly along cylinder span because of the three dimensionality of the flow. The presence of turbulent boundary layer makes cylinder back pressure more uniform along cylinder span relative to that in uniform flow. Transition from subcritical to critical regime occurs earlier near cylinder free end in uniform flow, while this behavior disappears with the presence of turbulent boundary layer.
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