Performance and noise trade-offs on a civil airliner with over-the-wing engines
Performance and noise trade-offs on a civil airliner with over-the-wing engines
Community noise has become a major consideration in the design of new aircraft. The noise generated by the engines has decreased over the generations to the extent that a whole-airframe approach is required now to achieve further significant reductions. One option is to install the engines over the wings so the airframe reflects the fan noise away from on-the-ground observers. However, in addition to good noise shielding performance, the position of the engine also has to satisfy aerodynamic efficiency criteria. We investigate the sensitivity of aerodynamic and acoustic performance metrics with respect to the positioning of the engine relative to the wing. More specifically, we trade drag computed via Reynolds-Averaged Navier Stokes simulations versus noise shielding performance, obtained experimentally through scale model tests conducted in an anechoic chamber. Surrogate models of both metrics are constructed, enabling their Pareto analysis on the specific case of a modified DLR F6 airframe geometry.
Powell, S.
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Sobester, A.
096857b0-cad6-45ae-9ae6-e66b8cc5d81b
Joseph, P.F.
9c30491e-8464-4c9a-8723-2abc62bdf75d
5 January 2011
Powell, S.
c500f263-228b-4e1f-a7fb-07542e3c8360
Sobester, A.
096857b0-cad6-45ae-9ae6-e66b8cc5d81b
Joseph, P.F.
9c30491e-8464-4c9a-8723-2abc62bdf75d
Powell, S., Sobester, A. and Joseph, P.F.
(2011)
Performance and noise trade-offs on a civil airliner with over-the-wing engines.
49th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, Orlando, United States.
04 - 07 Jan 2011.
17 pp
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
Community noise has become a major consideration in the design of new aircraft. The noise generated by the engines has decreased over the generations to the extent that a whole-airframe approach is required now to achieve further significant reductions. One option is to install the engines over the wings so the airframe reflects the fan noise away from on-the-ground observers. However, in addition to good noise shielding performance, the position of the engine also has to satisfy aerodynamic efficiency criteria. We investigate the sensitivity of aerodynamic and acoustic performance metrics with respect to the positioning of the engine relative to the wing. More specifically, we trade drag computed via Reynolds-Averaged Navier Stokes simulations versus noise shielding performance, obtained experimentally through scale model tests conducted in an anechoic chamber. Surrogate models of both metrics are constructed, enabling their Pareto analysis on the specific case of a modified DLR F6 airframe geometry.
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Published date: 5 January 2011
Venue - Dates:
49th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, Orlando, United States, 2011-01-04 - 2011-01-07
Identifiers
Local EPrints ID: 172589
URI: http://eprints.soton.ac.uk/id/eprint/172589
PURE UUID: 7ebf7767-68e7-4996-a35b-474628c295ab
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Date deposited: 27 Jan 2011 12:13
Last modified: 14 Mar 2024 02:47
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Author:
S. Powell
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