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Investigation of Wall-Pressure Fluctuations Characteristics on a NACA0012 Airfoil with Blunt Trailing Edge

Grébert, Arnaud and Bodart, Julien and Joly, Laurent Investigation of Wall-Pressure Fluctuations Characteristics on a NACA0012 Airfoil with Blunt Trailing Edge. (2016) In: 22nd AIAA/CEAS Aeroacoustics Conference, Aeroacoustics Conferences, 30 May 2016 - 1 June 2016 (Lyon, France).

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Official URL: http://dx.doi.org/10.2514/6.2016-2811

Abstract

The trailing edge noise, or the so-called self-noise of an airfoil, significantly contributes to the broadband noise in various configurations such as high bypass-ratio engines and counter-rotating open rotors. The present work aims at characterizing the wall-pressure fluctuations in the turbulent boundary layer just upstream the trailing edge, that are known to shape the trailing edge noise spectrum. These investigations are carried out using large- eddy simulations, with the massively parallel compressible solver CharLESX, of the flow over a truncated NACA0012 airfoil at Rec = 4×105 for angles of attack α = 0◦ and α = 6.25◦. Unsteady wall-pressure signals are recorded using several thousands of probes distributed over the suction side. We focus on data-processing the pressure signals to extract quantities crucial to trailing edge noise modelling: the convection velocity Uc, the spanwise correlation length lz and the spectrum of the wall-pressure fluctuations Φpp.

Item Type:Conference or Workshop Item (Paper)
Audience (conference):International conference 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: Arnaud Grébert
Deposited On:25 Jan 2017 15:56

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