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Towards the characterization of micro vortex generators effects on shock wave / turbulent boundary layer interaction using LES

Grébert, Arnaud and Bodart, Julien and Jamme, Stéphane and Joly, Laurent Towards the characterization of micro vortex generators effects on shock wave / turbulent boundary layer interaction using LES. (2016) In: 11th International ERCOFTAC Symposium on Engineering Turbulence Modelling and Measurements, 21 September 2016 - 23 September 2016 (Sicily, Italy).

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Abstract

We perform Large Eddy Simulations (LES) of the experimental configuration by Wang et al. (2012): a rake of microramp vortex generators (MVGs) were inserted upstream the SWTBLI. The configuration features MVGs protruding by 0.47 delta in a TBL at M = 2.7 and Re_theta = 3600. We first validate the flow solver and LES strategy on a baseline configuration without control and we retrieve the characteristic length scales and the low frequency motion (StL = 0.03) of the reflected shock foot. The configuration with MVGs exhibits successive regions alternating between either momentum deficit or momentum excess downstream the MVGs, with good agreement with the experiments. Classical wake recovery laws were retrieved as well as the frequency of St = 0.53 characteristic of the shedding of intermittent structures downstream the MVGs and we observe a significant 20% decrease of the separation bubble length.

Item Type:Conference or Workshop Item (Paper)
HAL Id:hal-01661768
Audience (conference):International conference without published proceedings
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Institution:Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
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Deposited By: Stéphane Jamme
Deposited On:11 Dec 2017 16:07

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