Etude aéroacoustique de configurations génériques de dispositifs hypersustentateurs : approches analytique et expérimentale
type: Dataset
description: Air traffic still grows from decades, with yearly 6 billion passengers nowadays in the world. By 2020, the EC imposes aircraft noise reductions by 10 dB per measuring point with respect to the status in 2000. In this context, VALIANT (VALidation and Improvement of Airframe Noise prediction Tools) is an EC-supported project that aims at testing, validating and improving numerical codes and analytical/theoretical models for the prediction of airframe noise (landing gears + high-lift devices) in simplified configurations in order to generate test cases for research needs. The main objective of the thesis in connection with ECL contribution in the scope of VALIANT project is to generate reliable experimental databases for 2-element systems - slatwing and wing-flap - as well as to analytically model overlapping configurations. It is particulary focussed on the experimental and analytical studies of a non lifting wing-flap system in a parallel flow, in aligned and overlapping arrangements. This is aimed at discussing likely aerodynamic and/or acoustic interactions. The tests have been carried out in an open-jet anechoic wind-tunnel for each arrangement and for several flow speeds (30-100 m/s), with main interest on 50 m/s (M0 ∼ 0, 15). The turbulence rate could be changed by fixing a removable turbulence grid with a large mesh at the outlet cross-section of the duct. Aerodynamic results (hot-wire anemometry, wall-pressure) show a strong interaction when the wing-flap distance is about the wing trailingedge boundary layer thickness. Acoustic coupling can be pointed out in cases of overlap. Source localization tests performed by ONERA/DSNA have permitted to validate far-field acoustic tests since no installation effect source seems to strongly radiate below 10 kHz. A good agreement with numerical simulations has been shown for every test. In order to predict noise analytically for a 2-element system in case of overlap in a uniform flow, the mathematical statement has been d…
identifier: NNT: 2013ECDL0003
issued: 2026-05-05T21:10:52.172747
language: fr
modified: 2026-05-05T21:10:52.172751
contact point: Organization
  fn: CCSD
keyword: aeroacoustics
keyword: aeroacoustique
keyword: analytical-modelling
keyword: bruit-des-dispositifs-hypersustentateurs
keyword: high-lift-device-noise
keyword: infoeu-reposemanticsdoctoralthesis
keyword: mesures-en-soufflerie
keyword: modelisation-analytique
keyword: spiotherengineering-sciences-physicsother
keyword: theses
keyword: wind-tunnel-testing
landing page: https://theses.hal.science/tel-00965211

Etude aéroacoustique de configurations génériques de dispositifs hypersustentateurs : approches analytique et expérimentale
type: Distribution
format: HTML
issued: 2026-05-05T21:10:52.208252
modified: 2026-05-05T21:10:52.157500
access URL: https://theses.hal.science/tel-00965211

test_moissonnage_selune
type: Agent