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Propulsion system noise: Turbomachinery

Propulsion system noise: Turbomachinery
Propulsion system noise: Turbomachinery
Turbomachinery sources are important contributors to whole aircraft noise both at takeoff and approach. The turbomachinery contribution contains both tone and broadband components and is generated by a variety of mechanisms that occur in the fan, turbine, compressor, and combustor. These different sources are reviewed along with technologies that have been developed to mitigate their effect, either by reducing noise at source or by applying sound-absorbing treatments within the engine. Discussion is limited here to the exterior impact of turbofan noise on communities near airports. The effect on passengers and crew within the aircraft is dealt with separately elsewhere. Attempts to mitigate the environmental impact of aircraft noise are dominated by the metrics that are used to certify and regulate aircraft noise. These are introduced and their implications are discussed.

turbofan noise, effective perceived noise level, fan, compressor, turbine, combustor, nacelles, acoustic liners
9780470754405
3509-3520
Wiley-Blackwell
Astley, J.R.
cb7fed9f-a96a-4b58-8939-6db1010f9893
Blockley, R.
Shyy, W.
Astley, J.R.
cb7fed9f-a96a-4b58-8939-6db1010f9893
Blockley, R.
Shyy, W.

Astley, J.R. (2010) Propulsion system noise: Turbomachinery. In, Blockley, R. and Shyy, W. (eds.) Encyclopaedia of Aerospace Engineering. Chichester, GB. Wiley-Blackwell, pp. 3509-3520. (doi:10.1002/9780470686652.eae336).

Record type: Book Section

Abstract

Turbomachinery sources are important contributors to whole aircraft noise both at takeoff and approach. The turbomachinery contribution contains both tone and broadband components and is generated by a variety of mechanisms that occur in the fan, turbine, compressor, and combustor. These different sources are reviewed along with technologies that have been developed to mitigate their effect, either by reducing noise at source or by applying sound-absorbing treatments within the engine. Discussion is limited here to the exterior impact of turbofan noise on communities near airports. The effect on passengers and crew within the aircraft is dealt with separately elsewhere. Attempts to mitigate the environmental impact of aircraft noise are dominated by the metrics that are used to certify and regulate aircraft noise. These are introduced and their implications are discussed.

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More information

Published date: 2010
Keywords: turbofan noise, effective perceived noise level, fan, compressor, turbine, combustor, nacelles, acoustic liners

Identifiers

Local EPrints ID: 173015
URI: https://eprints.soton.ac.uk/id/eprint/173015
ISBN: 9780470754405
PURE UUID: 9e4f6296-d261-4825-b7f1-2c33a8ca61ff

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Date deposited: 01 Feb 2011 14:36
Last modified: 09 Apr 2019 16:32

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