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Application du contrôle par jets pulsés à un corps non profilé

Abstract : This manuscript describes the research conducted within the CARAVAJE project (" Contrôle de l'AéRodynAmique externe des Véhicules Automobile par JEts pulsés ", i.e. control of the external aerodynamic of automotive vehicles by pulsed jets). The main objective is to develop a usable strategy for active control on a production car, in accordance with industry standards. As part of this thesis work, various control strategies using pulsed jets have been tested on a reduced scale simplified vehicle, the Ahmed body, using both classical solenoid actuators and MEMS actuators. With the solenoid valves, drag reductions between 6% and 12% were obtained for various strategies, and various links were found with the wall pressure evolutions and the wake modifications. Correspondences were also observed between the natural frequencies present in the recirculation bubble and the most effective control frequencies. MEMS actuators were then characterized, and drag reductions up to 9% have been obtained on the Ahmed body. A hybrid MEMS / solenoid system has finally been used on a full scale vehicle (Citroën C6), and the micro-jets have modified favorably the pressure distribution on the slant.
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https://pastel.archives-ouvertes.fr/pastel-00757966
Contributor : Pierric Joseph <>
Submitted on : Tuesday, November 27, 2012 - 5:47:26 PM
Last modification on : Friday, March 27, 2020 - 3:37:46 AM
Document(s) archivé(s) le : Thursday, February 28, 2013 - 3:46:13 AM

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  • HAL Id : pastel-00757966, version 1

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Pierric Joseph. Application du contrôle par jets pulsés à un corps non profilé. Mécanique des fluides [physics.class-ph]. Université Pierre et Marie Curie - Paris VI, 2012. Français. ⟨pastel-00757966⟩

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