LES of the flow and acoustics generated by an aircraft fan running in the vicinity of the ground
(2005) ASME Turbo Expo 2005 - Gas Turbie Technology: Focus for the Future 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:
https://lup.lub.lu.se/record/615657
- author
- Moroianu, Dragos LU ; Karlsson, Arne and Fuchs, Laszlo LU
- organization
- publishing date
- 2005
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- LES, Acoustical analogy, Fan noise
- host publication
- 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
- conference location
- Reno-Tahoe, NV, United States
- conference dates
- 2005-06-06 - 2005-06-09
- external identifiers
-
- wos:000242493400114
- scopus:27744548523
- language
- English
- LU publication?
- yes
- id
- f7c6cf59-5885-434a-bda8-d2e91f351002 (old id 615657)
- date added to LUP
- 2016-04-04 12:25:24
- date last changed
- 2022-01-29 23:24:58
@inproceedings{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}}, booktitle = {{Proceedings of the ASME Turbo Expo}}, keywords = {{LES; Acoustical analogy; Fan noise}}, language = {{eng}}, pages = {{1231--1239}}, publisher = {{American Society Of Mechanical Engineers (ASME)}}, 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}}, }