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Analyse expérimentale de l'aérodynamique proche paroi et modélisation du bruit de bord de fuite d'un profil d'aile en écoulement subsonique

Abstract : This work is devoted to the experimental study of the trailing edge noise mechanisms, especially broad band, resulting of the hydrodynamic waves diffraction on the sharp edge of a foil in flow, in view of its modelisation. In that way, a detailed examination of the dynamic behaviour of the characteristic aerodynamic quantities of the phenomenon (wall pressure and velocity fluctuations) has been made on a Naca 0012 airfoil. It has then been possible to obtain experimentally the statistic of the wall pressure field, and more particularly the wall pressure fluctuation wave number spectrum representative of the boundary layer turbulence dynamic, a fundamental quantity for the acoustic field estimation. Models of the literature of the wall pressure statistic (Corcos, Chase) have been fixed and validated, and finally used for the modelisation of the noise from the trailing edge of the airfoil.

Finally, measurements of the acoustic pressure radiated have been made in an anechoic wind tunnel, allowing to show the potentialities and the limitations of the implemented aeroacoustic model. The approach proposed by Chase in terms of wall pressure statistic modelisation appears to be able to represent correctly the influence of the main parameters of the problem (Reynolds number, airfoil incidence), while it has clearly been shown the necessity to take correctly account for the Kutta condition for the estimation of the noise radiated.
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https://tel.archives-ouvertes.fr/tel-00193029
Contributor : Cyrille Bonamy <>
Submitted on : Friday, November 30, 2007 - 12:14:04 PM
Last modification on : Monday, March 18, 2019 - 5:18:04 PM
Long-term archiving on: : Thursday, September 27, 2012 - 10:30:57 AM

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  • HAL Id : tel-00193029, version 1

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Cyrille Bonamy. Analyse expérimentale de l'aérodynamique proche paroi et modélisation du bruit de bord de fuite d'un profil d'aile en écoulement subsonique. Dynamique des Fluides [physics.flu-dyn]. Ecole Supérieure d'Ingénieurs de Poitiers - ESIP, 2007. Français. ⟨tel-00193029⟩

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