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LES of the flow and acoustics generated by an aircraft fan running in the vicinity of the ground

Moroianu, Dragos LU ; Karlsson, Arne and Fuchs, Laszlo LU (2005) ASME Turbo Expo 2005 - Gas Turbie Technology: Focus for the Future In Proceedings of the ASME Turbo Expo 6 PART B. p.1231-1239
Abstract
An important component of the aircraft generated noise, especially ahead of it, is the fan noise created by the high velocity variation near the blades and the interaction of the rotating fan with the fluid. In order to predict the sound, the method used involves the acoustical analogy developed by Ffowcs Williams and Hawkings. Computation of the flow field is performed in the incompressible LES framework, while the noise is evaluated using a non-homogeneous wave equation. In this work the influence of the angle between the fan and ground, on the total sound spectrum, the noise generation and the noise propagation is investigated. It is found that the near field is dominated by the blade passage frequency and an upward inclination of the... (More)
An important component of the aircraft generated noise, especially ahead of it, is the fan noise created by the high velocity variation near the blades and the interaction of the rotating fan with the fluid. In order to predict the sound, the method used involves the acoustical analogy developed by Ffowcs Williams and Hawkings. Computation of the flow field is performed in the incompressible LES framework, while the noise is evaluated using a non-homogeneous wave equation. In this work the influence of the angle between the fan and ground, on the total sound spectrum, the noise generation and the noise propagation is investigated. It is found that the near field is dominated by the blade passage frequency and an upward inclination of the fan will produce a slightly different sound pressure level than a horizontal or downward inclination. Copyright (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
LES, Acoustical analogy, Fan noise
in
Proceedings of the ASME Turbo Expo
volume
6 PART B
pages
1231 - 1239
publisher
American Society Of Mechanical Engineers (ASME)
conference name
ASME Turbo Expo 2005 - Gas Turbie Technology: Focus for the Future
external identifiers
  • WOS:000242493400114
  • Scopus:27744548523
language
English
LU publication?
yes
id
f7c6cf59-5885-434a-bda8-d2e91f351002 (old id 615657)
date added to LUP
2007-11-25 15:29:50
date last changed
2016-10-13 04:51:29
@misc{f7c6cf59-5885-434a-bda8-d2e91f351002,
  abstract     = {An important component of the aircraft generated noise, especially ahead of it, is the fan noise created by the high velocity variation near the blades and the interaction of the rotating fan with the fluid. In order to predict the sound, the method used involves the acoustical analogy developed by Ffowcs Williams and Hawkings. Computation of the flow field is performed in the incompressible LES framework, while the noise is evaluated using a non-homogeneous wave equation. In this work the influence of the angle between the fan and ground, on the total sound spectrum, the noise generation and the noise propagation is investigated. It is found that the near field is dominated by the blade passage frequency and an upward inclination of the fan will produce a slightly different sound pressure level than a horizontal or downward inclination. Copyright},
  author       = {Moroianu, Dragos and Karlsson, Arne and Fuchs, Laszlo},
  keyword      = {LES,Acoustical analogy,Fan noise},
  language     = {eng},
  pages        = {1231--1239},
  publisher    = {ARRAY(0xa5cbbe0)},
  series       = {Proceedings of the ASME Turbo Expo},
  title        = {LES of the flow and acoustics generated by an aircraft fan running in the vicinity of the ground},
  volume       = {6 PART B},
  year         = {2005},
}