Effect of visco-elastic coating on the aeroacoustics of high-lift leading edge device

Research output: Contribution to conferencePaper

Abstract

The effect of viscoelastic noise damping coating over the leading edge slat is discussed in the current study. Evidences from numerical and experimental studies are provided to highlight and/or identify controlling factor/s used to analyse the noise damping mechanism by visco-elastic material. In the previous study (linked to the current), pressure fluctuations over the wing-slat model were measured in a low-speed wind tunnel. The unsteady slat’s surface measurements were made with and without the viscoelastic coating. The measured unsteady data were incorporated into acoustic analogy for calculating spectral quantities and far field noise. Through spectral analysis the effect of the coating was examined and shown that the levels of unsteady fluctuations over the slat surface were damped by almost 600 Pa in the case of coating, corresponding to almost 3 dB reduction in slat’s far-field noise radiation.
Original languageEnglish
Publication statusPublished - 2014
Externally publishedYes
EventGreener Aviation 2014: Clean Sky breakthroughs and worldwide status - The SQUARE, Brussels Meeting Centre, Brussels, Belgium
Duration: 12 Mar 201414 Mar 2014

Conference

ConferenceGreener Aviation 2014
CountryBelgium
CityBrussels
Period12/03/1414/03/14

Fingerprint

aeroacoustics
leading edges
leading edge slats
coatings
far fields
damping
low speed wind tunnels
electromagnetic noise
spectrum analysis
acoustics

Cite this

Rakhshani, B. (2014). Effect of visco-elastic coating on the aeroacoustics of high-lift leading edge device. Paper presented at Greener Aviation 2014, Brussels, Belgium.
@conference{a656d0d84e534554b95c22bf1c3fa329,
title = "Effect of visco-elastic coating on the aeroacoustics of high-lift leading edge device",
abstract = "The effect of viscoelastic noise damping coating over the leading edge slat is discussed in the current study. Evidences from numerical and experimental studies are provided to highlight and/or identify controlling factor/s used to analyse the noise damping mechanism by visco-elastic material. In the previous study (linked to the current), pressure fluctuations over the wing-slat model were measured in a low-speed wind tunnel. The unsteady slat’s surface measurements were made with and without the viscoelastic coating. The measured unsteady data were incorporated into acoustic analogy for calculating spectral quantities and far field noise. Through spectral analysis the effect of the coating was examined and shown that the levels of unsteady fluctuations over the slat surface were damped by almost 600 Pa in the case of coating, corresponding to almost 3 dB reduction in slat’s far-field noise radiation.",
author = "Bassam Rakhshani",
year = "2014",
language = "English",
note = "Greener Aviation 2014 : Clean Sky breakthroughs and worldwide status ; Conference date: 12-03-2014 Through 14-03-2014",

}

Rakhshani, B 2014, 'Effect of visco-elastic coating on the aeroacoustics of high-lift leading edge device' Paper presented at Greener Aviation 2014, Brussels, Belgium, 12/03/14 - 14/03/14, .

Effect of visco-elastic coating on the aeroacoustics of high-lift leading edge device. / Rakhshani, Bassam.

2014. Paper presented at Greener Aviation 2014, Brussels, Belgium.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Effect of visco-elastic coating on the aeroacoustics of high-lift leading edge device

AU - Rakhshani, Bassam

PY - 2014

Y1 - 2014

N2 - The effect of viscoelastic noise damping coating over the leading edge slat is discussed in the current study. Evidences from numerical and experimental studies are provided to highlight and/or identify controlling factor/s used to analyse the noise damping mechanism by visco-elastic material. In the previous study (linked to the current), pressure fluctuations over the wing-slat model were measured in a low-speed wind tunnel. The unsteady slat’s surface measurements were made with and without the viscoelastic coating. The measured unsteady data were incorporated into acoustic analogy for calculating spectral quantities and far field noise. Through spectral analysis the effect of the coating was examined and shown that the levels of unsteady fluctuations over the slat surface were damped by almost 600 Pa in the case of coating, corresponding to almost 3 dB reduction in slat’s far-field noise radiation.

AB - The effect of viscoelastic noise damping coating over the leading edge slat is discussed in the current study. Evidences from numerical and experimental studies are provided to highlight and/or identify controlling factor/s used to analyse the noise damping mechanism by visco-elastic material. In the previous study (linked to the current), pressure fluctuations over the wing-slat model were measured in a low-speed wind tunnel. The unsteady slat’s surface measurements were made with and without the viscoelastic coating. The measured unsteady data were incorporated into acoustic analogy for calculating spectral quantities and far field noise. Through spectral analysis the effect of the coating was examined and shown that the levels of unsteady fluctuations over the slat surface were damped by almost 600 Pa in the case of coating, corresponding to almost 3 dB reduction in slat’s far-field noise radiation.

M3 - Paper

ER -

Rakhshani B. Effect of visco-elastic coating on the aeroacoustics of high-lift leading edge device. 2014. Paper presented at Greener Aviation 2014, Brussels, Belgium.