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A contribution to the jet noise installation problem

A contribution to the jet noise installation problem
A contribution to the jet noise installation problem
The main objective of this thesis is to understand and predict jet noise installation effects for engines mounted below aircraft wings. This is done through a variety of empirical, analytical and computational methods. Aspects of the jet source are examined and a jet source model, suitable for determining installation effects is derived. As part of this research programme a novel and extensive set of model scale jet noise installation effects experiments were undertaken. These results are presented and analyzed in this thesis. A new semi-empirical method, which can readily predict installation effects for heated coaxial jets is presented and validated using experimental data. A new 3D ray theory jet propagation method for sources in a steady inhomogeneous moving medium is presented. This method is benched marked using an analytical solution of the Lilley equation. The 3-D method is further enhanced by combing it with realistic CFD jet velocity profiles, and bench marked using the data from the experimental programme
McLaughlin, P.
e0179e13-72c6-484b-b963-069ba323bbcd
McLaughlin, P.
e0179e13-72c6-484b-b963-069ba323bbcd
Self, R.H.
8b96166d-fc06-48e7-8c76-ebb3874b0ef7

McLaughlin, P. (2010) A contribution to the jet noise installation problem. University of Southampton, Institute of Sound and Vibration Research, Doctoral Thesis, 179pp.

Record type: Thesis (Doctoral)

Abstract

The main objective of this thesis is to understand and predict jet noise installation effects for engines mounted below aircraft wings. This is done through a variety of empirical, analytical and computational methods. Aspects of the jet source are examined and a jet source model, suitable for determining installation effects is derived. As part of this research programme a novel and extensive set of model scale jet noise installation effects experiments were undertaken. These results are presented and analyzed in this thesis. A new semi-empirical method, which can readily predict installation effects for heated coaxial jets is presented and validated using experimental data. A new 3D ray theory jet propagation method for sources in a steady inhomogeneous moving medium is presented. This method is benched marked using an analytical solution of the Lilley equation. The 3-D method is further enhanced by combing it with realistic CFD jet velocity profiles, and bench marked using the data from the experimental programme

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Published date: December 2010
Organisations: University of Southampton

Identifiers

Local EPrints ID: 190205
URI: http://eprints.soton.ac.uk/id/eprint/190205
PURE UUID: 198f0cc4-e96b-4640-8c14-231a89acb00b

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Date deposited: 13 Jun 2011 09:13
Last modified: 14 Mar 2024 03:37

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Contributors

Author: P. McLaughlin
Thesis advisor: R.H. Self

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