22nd Congress of International Council of the Aeronautical Sciences, Harrogate, UK, 28 August - 1st September, 2000
Paper ICAS 2000-2.10.3

THE INTERACTION OF A SYNTHETIC JET WITH A TURBULENT BOUNDARY LAYER

A. Crook, W. J. Crowther, N. J. Wood
University of Manchester, UK

Keywords: synthetic jet, turbulent boundary layer, interaction

Preliminary research using synthetic jets to control the separation line of a turbulent boundary layer on a circular cylinder, has revealed that periodic ejection and suction through an orifice leads to a time averaged jet structure, and a time averaged delay of the separation line. To answer the question of how a periodic ejection and suction can produce this effect, research has been undertaken to study the behavior of the vortex rings in quiescent, cross flow and shear flow condition. Finally, a hypothesis is presented to link these preliminary findings to the structures seen on the cylinder.

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