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Characterisation of the Transient Dynamics of a Controlled Separated Flow Using Phase Averaged PIV

Instability and Control of Massively Separated Flows

type de publication      ouvrage scientifique (ou chapitre)
nom du livre Instability and Control of Massively Separated Flows
date de publication 2015
auteur(s) Raibaudo Cédric; Kerherve Franck; Stanislas Michel
volume (numéro) 107
  
pages 183 – 188
ISBN / ISSN 978-3-319-06259-4
résumé The transient dynamics of a high Reynolds number two-dimensional boundary layer flow undergoing a massive separation is investigated. A spanwise array of pulsed round jets, located upstream of the separated region, is used as actuators. Spatial and temporal organisation of the separation and reattachment processes are investigated using phase-averaged PIV measurements in combination with the survey of wall friction along the separation region with the overall objective to develop closed-loop controllers. While different sets of parameters including freestream flow to jet velocities ratio, duty cycle and jets frequency have been considered in the overall work, preliminary results for two cases are presented within.
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