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Ninth International Symposium on Turbulence and Shear Flow Phenomena
June 30 - July 3, 2015, University of Melbourne, Australia

DOI: 10.1615/TSFP9

ACTIVE SEPARATION CONTROL PROCESS OVER A SHARP EDGE RAMP

pages 341-346
DOI: 10.1615/TSFP9.580
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ABSTRACT

Pulsed jets vortex generators are used to control a flow separation along a 25° ramp with sharp edge. The actuator optimization is done following the results of previous studies. Before to perform closed loop control, the present study deals with open loop control. In this case, the interactions of the actuation with the separated flow is observed during steady and transient states. The effect of actuation frequency is investigated, including the impact of actuation frequency close to the vortex shedding frequency. The analysis of the separation and the influence of the flow control are based on wall pressure distribution and velocity fields obtained by 2D-2C PIV. Characterization of attachment and separation phases are also investigated. This study shows that the actuator used can reduce significantly the separation zone.

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