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ISSN オンライン: 2642-0554

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

Romain Mathis
Laboratoire de Mecanique de Lille CNRS UMR 8107, University Lille Nord de France 59655 Villeneuve d'Ascq, France

Erwan Collin
Laboratoire d'Etudes Aérodynamiques, UMR CNRS 6609 - Université de Poitiers - ENSMA CE.A.T., 43, route de l'Aérodrome F-86036 Poitiers - France

Joel Delville
Department of Fluid Flow, Heat Transfer and Combustion Institute Pprime - UPR 3346 - CNRS - Universite de Poitiers - ENSMA CEAT - F86036 Poitiers cedex, France

Jean-Paul Bonnet
Institut Pprime-Branche fluide Université de Poitiers 43 route de l'aérodrome,86000 Poitiers, France

要約

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.