Abstract
Flow around a cantilevered circular cylinder has been studied experimentally in the subcritical and critical Reynolds-number ranges. Particular attention was paid to the free-stream turbulence effects on the steady aerodynamic characteristics of the cylinder. Measurements were made of the surface pressure distribution, flow separation line and vortex shedding frequency in grid-generated turbulent flows. The aerodynamic characteristics of a cylinder were only minutely affected by the free-stream turbulence in the subcritical flow. The critical Reynolds number was expressed as a function of the Taylor number Tx defined in terms of the longitudinal integral scale of the free-stream turbulence. The mean drag coefficient and the position of the flow separation point were fairly well-correlated with the parameter Re 1.34 Tx , with Re being the Reynolds number. Furthermore, it was found that some steady aerodynamic coefficients of the cylinder were closely correlated among themselves.
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