Turbulence-airfoil interaction noise reduction using wavy leading edge: an experimental and numerical study - Archive ouverte HAL Access content directly
Conference Papers Year : 2011

Turbulence-airfoil interaction noise reduction using wavy leading edge: an experimental and numerical study

Abstract

Passive treatments aiming at reducing turbofan broadband noise have been recently studied in the framework of European Project FLOCON. A concept based on a sinusoidal variation of the leading edge of a single airfoil expected to decrease interaction noise has been investigated by ONERA. Turbulence-airfoil interaction mechanism is achieved using a turbulence grid located upstream of a NACA airfoil tested in ISVR anechoic open wind tunnel. High noise reductions are obtained (3-4 dB) for all studied flow speeds. Experimental work is supplemented by numerical simulations using RANS/LES and CAA Euler-based approaches to predict the acoustic response of the wing. Isentropic turbulence is synthetically injected by means of a suited inflow boundary condition. Unsteady simulations are restricted to the baseline case (without treatment) and the present paper focuses on direct Euler methodology which provides reliable power spectrum density comparing to experiment. Effect of leading edge serrations on aerodynamics and noise is emphasized using Amiet thin airfoil theory, RANS solutions and available measurements.
Fichier principal
Vignette du fichier
Polacsek_Internoise_2011.pdf (8.81 Mo) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

hal-02086677 , version 1 (16-04-2019)

Identifiers

  • HAL Id : hal-02086677 , version 1

Cite

Cyril Polacsek, Vincent Clair, Gabriel Reboul, Hugues Deniau. Turbulence-airfoil interaction noise reduction using wavy leading edge: an experimental and numerical study. Institute of Noise Control Engineering/Japan & Acoustical Society of Japan, Sep 2011, Osaka, Japan. pp.170-180. ⟨hal-02086677⟩
230 View
200 Download

Share

Gmail Facebook X LinkedIn More