Overview of coupling noise prediction for turbofans with engine and aircraft performance

Abstract In this work, a comparison of the noise levels of different aero-engines is presented. The coupling is based on integrating a gas turbine design and performance model with an aircraft model for long and short hauls and a noise model made of established empirical methods available in the ope...

Full description

Saved in:
Bibliographic Details
Published in:Proceedings of the Institution of Mechanical Engineers. Part G, Journal of aerospace engineering Journal of aerospace engineering, 2008-06, Vol.222 (4), p.515-529
Main Authors: Pascovici, D S, Sorato, S, Ogaji, S O T, Pilidis, P
Format: Article
Language:English
Subjects:
Aerospace engineering
Aerospace engines
Aircraft
Aircraft performance
Attenuation
Attenuators
Broadband
Bypass ratio
Coupling
Engine noise
Equivalence
Fuel consumption
Jet aircraft noise
Joining
Linings
Mathematical models
Noise control
Noise generation
Noise levels
Noise prediction (aircraft)
Noise reduction
Thrust
Turbofan engines
Turbofans
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Abstract In this work, a comparison of the noise levels of different aero-engines is presented. The coupling is based on integrating a gas turbine design and performance model with an aircraft model for long and short hauls and a noise model made of established empirical methods available in the open literature for turbofan noise prediction at design and off-design points. After joining together the performance models with the noise methods, the authors have studied three ultra high bypass ratio engine configurations vis-à-vis their baseline counterpart of equivalent thrust rating. Also, the effect of application of passive noise attenuators (liners) to reduce the noise is explored. The results obtained showed that though there are derivable benefits from the ultra high bypass ratio turbofans, such as reduction in fuel consumption, in jet noise and reduction of broadband noise for the fan, the new engines generate higher noise at lower frequencies in the fan.
ISSN:0954-4100
2041-3025
DOI:10.1243/09544100JAERO254