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Unsteady characteristics of the static stall of an airfoil subjected to freestream turbulence level up to 16%

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Abstract

Fluctuation of the separation point on an airfoil under high turbulence level is investigated using pressure measurements and flow visualisations. The characteristics of the unsteady loads induced by Karman vortex shedding are studied. This is related with a local approach based on the study of the oscillation zone. A method based on the pressure standard deviation is proposed to obtain the length of this zone, which is found to be independent of the turbulence level. This result is in agreement with that obtained by spectral analysis which shows no effect of the turbulence level on the Karman vortex shedding frequency.

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Authors and Affiliations

  1. Laboratoire de Mécanique et d’Energétique, 8 rue Léonard de Vinci, 45 072, Orléans Cedex 02, France

    Christophe Sicot, Sandrine Aubrun, Stephane Loyer & Philippe Devinant

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  1. Christophe Sicot
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  2. Sandrine Aubrun
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  3. Stephane Loyer
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  4. Philippe Devinant
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Correspondence to Christophe Sicot.

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Sicot, C., Aubrun, S., Loyer, S. et al. Unsteady characteristics of the static stall of an airfoil subjected to freestream turbulence level up to 16%. Exp Fluids 41, 641–648 (2006). https://doi.org/10.1007/s00348-006-0187-9

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  • DOI: https://doi.org/10.1007/s00348-006-0187-9

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