Abstract
Some empirical data relating to the effects of free-stream turbulence on the drag of circular cylinders are reviewed. Possible sources of errors or discrepancies in this data are examined. Likely influences of various turbulence parameters on shear-layer phenomena are suggested, including early transition, increased entrainment and vorticity amplification. It is concluded that more information is required to resolve the various factors involved, and that future investigations should pay strict attention to experimental details such as a complete description of turbulence and the avoidance of three-dimensional flow problmes.
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