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Fourth International Symposium on Turbulence and Shear Flow Phenomena
June, 27-29, 2005, Marriot Hotel, Williamsburg, Virginia, USA

DOI: 10.1615/TSFP4

THE IMPACT OF BOUNDARY LAYER SEPARATION CONTROL ON A PLANE MIXING LAYER

pages 1113-1118
DOI: 10.1615/TSFP4.1850
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摘要

The purpose of this experimental study is to analyze the effects of a driven separation near the trailing edge of a splitter-plate on the development of a turbulent mixing layer. The separation is driven by a steady pneumatic injection, and is considered here as an actuator for controlling the mixing efficiency of the mixing layer. Particle image velocimetry and hot wire measurements are performed for the natural and the manipulated regimes. The results highlight the hyper-mixing capabilities of the control strategy. Analyses of the turbulent field and coherent structures organization give essential information about the mechanisms responsible for the mixing enhancement.

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