Abstract

Gas concentrations were measured in and near the separated, recirculating wake behind a cylinder with a splitter plate in uniform flow. The tracer gas was released from a line source near the cylinder in a wind tunnel with grid-generated turbulence. Concentrations measured in the wake are in agreement with theoretical predictions (Puttock and Hunt, 1978) except for a source near the downstream end of the wake. Finally, the relationship between two- and three-dimensional wake flows is discussed, and measurements in the near-wakes of three-dimensional obstacles are briefly reviewed.

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