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Nagawkar, B. (2016) Numerical study of Aeroacoustic sources generated from the wake behind the car . Göteborg : Chalmers University of Technology (Diploma work - Department of Applied Mechanics, Chalmers University of Technology, Göteborg, Sweden, nr: 2016:70).
BibTeX
@mastersthesis{
Nagawkar2016,
author={Nagawkar, Barlev},
title={Numerical study of Aeroacoustic sources generated from the wake behind the car },
abstract={Due to new legislative and consumer demands Europe’s major vehicle manufactures
(Original Equipment Manufacturer, OEMs) are forced to make big investments in
the area of aeroacoustics. To measure a small noise contribution in wind tunnels is a
challenge. Do to uncertainties of physical testing, the importance of using numerical
methods for aeroacoustics has gone up.
In this thesis an aeroacoustics study is performed on generic bodies with a focus on
the wake. Three types of Ahmed bodies are used namely, the slant or fast back, the
square or bus back and the notch or sedan back. The geometries being different in
the rear will generate different wake structures and difference in noise levels obtained
from these are analysed.
An hybrid computational aeroacoustic method is adopted where first Large Eddy
Simulations (LES) are done using AVL Fire to simulate the flow field. The sound
propagation is then solved by using the Curle acoustic analogy.},
publisher={Institutionen för tillämpad mekanik, Strömningslära, Chalmers tekniska högskola},
place={Göteborg},
year={2016},
series={Diploma work - Department of Applied Mechanics, Chalmers University of Technology, Göteborg, Sweden, no: 2016:70},
keywords={Aeroacoustics, Curle, Large Eddy Simulations, Ahmed body, CFD, CAA},
}
RefWorks
RT Generic
SR Electronic
ID 242130
A1 Nagawkar, Barlev
T1 Numerical study of Aeroacoustic sources generated from the wake behind the car
YR 2016
AB Due to new legislative and consumer demands Europe’s major vehicle manufactures
(Original Equipment Manufacturer, OEMs) are forced to make big investments in
the area of aeroacoustics. To measure a small noise contribution in wind tunnels is a
challenge. Do to uncertainties of physical testing, the importance of using numerical
methods for aeroacoustics has gone up.
In this thesis an aeroacoustics study is performed on generic bodies with a focus on
the wake. Three types of Ahmed bodies are used namely, the slant or fast back, the
square or bus back and the notch or sedan back. The geometries being different in
the rear will generate different wake structures and difference in noise levels obtained
from these are analysed.
An hybrid computational aeroacoustic method is adopted where first Large Eddy
Simulations (LES) are done using AVL Fire to simulate the flow field. The sound
propagation is then solved by using the Curle acoustic analogy.
PB Institutionen för tillämpad mekanik, Strömningslära, Chalmers tekniska högskola,
T3 Diploma work - Department of Applied Mechanics, Chalmers University of Technology, Göteborg, Sweden, no: 2016:70
LA eng
LK http://publications.lib.chalmers.se/records/fulltext/242130/242130.pdf
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