Skip to Main content Skip to Navigation
Theses

Calcul direct du rayonnement acoustique généré par une cavité cylindrique sous une aile d'avion

Abstract : Aerodynamically generated noise sources are multiple for an airplane. During the landing phase, airframe noise is the main source. At the instigation of Airbus, the project AEROCAV (Aeroacoustics of cavities) deals with the noise produced by cylindrical burst-disk cavities located under the wings. An intense tonal noise is emitted. Numerical simulations of the noise generated by these cylindrical cavities are performed to investigate the noise source mechanisms by using Direct Noise Computation. Such simulations require high-accuracy numerical algorithms in order to compute the fine-scale turbulence together with the very weak associated noise radiation. An overset grid method is developed to tackle the complex geometry of interest. The main point is to choose an interpolation method preserving the high-accuracy of the numerical schemes in order to ensure the communication between the different grids. Turbulent inflow methods based on synthetic turbulence, recycling techniques, or bypass transition are investigated to reproduce the flow conditions of the wind tunnel. Two Large Eddy Simulations are conducted for a cavity with a diameter and a height of 100 mm, and a freestream velocity of 70 m/s, with the turbulent inflow method for one of these computations. The characteristics of the flow and noise, as measured in the AEROCAV experimental campaign, are satisfactorily reproduced by the direct noise computations.
Complete list of metadatas

https://pastel.archives-ouvertes.fr/pastel-00639012
Contributor : Jérèmie Chicheportiche <>
Submitted on : Monday, November 7, 2011 - 7:17:33 PM
Last modification on : Friday, July 17, 2020 - 2:56:29 PM
Long-term archiving on: : Wednesday, February 8, 2012 - 2:36:36 AM

Identifiers

  • HAL Id : pastel-00639012, version 1

Citation

Chicheportiche Jérèmie. Calcul direct du rayonnement acoustique généré par une cavité cylindrique sous une aile d'avion. Mécanique des fluides [physics.class-ph]. Arts et Métiers ParisTech, 2011. Français. ⟨NNT : 2011ENAM0027⟩. ⟨pastel-00639012⟩

Share