Comptes Rendus
no. 6-7
Separation flow control
Experimental detection of flow separation over a plain flap by wall shear stress analysis with and without steady blowing
[Détection expérimentale du décollement de l'écoulement sur un volet sans fente par l'analyse du frottement pariétal avec ou sans soufflage continu]
Timothée Chabert1  ; Julien Dandois1 ; Éric Garnier1 ; Laurent Jacquin1
1 Onera – The French Aerospace Lab, 8, rue des Vertugadins, 92190 Meudon, France
Comptes Rendus. Mécanique, Volume 342 (2014) no. 6-7, pp. 389-402.

Cet article traite de la détection du décollement de l'écoulement sur un volet sans fente pour un nombre de Reynolds de 2⋅106 par l'analyse des fluctuations du frottement pariétal. On considère en premier lieu le décollement naturel à travers l'étude de l'évolution des fluctuations de frottement pariétal mesurées sur la corde du volet lorsque son angle de braquage augmente progressivement. Par la suite, un contrôle par soufflage continu est appliqué et l'effet de ce contrôle sur les fluctuations de frottement pariétal est étudié. Dans les cas contrôlé et non contrôlé, des critères de décollement sont définis, étudiés et comparés entre eux.

The present article deals with the flow separation detection over a plain flap at a Reynolds number of 2⋅106 by the analysis of the wall shear stress fluctuations. Natural flow separation is first considered with the study of the evolution of wall shear stress fluctuations measured along the flap chord when the flap deflection angle is progressively increased. Then, steady blowing is applied and its effect on wall shear stress fluctuations is analysed. For both controlled and uncontrolled cases, flow separation criteria are defined, studied and compared.

Reçu le :
Accepté le :
Publié le :
DOI : 10.1016/j.crme.2014.01.013
Keywords: Flow separation, Flow control, Flap, Steady blowing
Mot clés : Décollement, Contrôle des écoulements, Volet, Soufflage continu
Timothée Chabert 1 ; Julien Dandois 1 ; Éric Garnier 1 ; Laurent Jacquin 1

1 Onera – The French Aerospace Lab, 8, rue des Vertugadins, 92190 Meudon, France 
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Timothée Chabert; Julien Dandois; Éric Garnier; Laurent Jacquin. Experimental detection of flow separation over a plain flap by wall shear stress analysis with and without steady blowing. Comptes Rendus. Mécanique, Volume 342 (2014) no. 6-7, pp. 389-402. doi : 10.1016/j.crme.2014.01.013. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2014.01.013/

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