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High frequency jet noise installation for an under wing mounted aircraft

High frequency jet noise installation for an under wing mounted aircraft
High frequency jet noise installation for an under wing mounted aircraft
This paper presents a generic 3-dimensional ray-theory based model to predict installation effects on a distributed jet source for aircraft with under-wing mounted engines. The model extends previous work by improving the hot jet blockage model from a 2-dimensional empirical model to a fully 3-dimensional semiempirical model. This new model is based on static rig test experiments described in this paper. Further improvements are made including variable directivity of the jet source (rather than an omni-directional assumption) which is important in predicting the correct reflection strengths for sources downstream from the nozzle. The directivity is determined both from analytic models and empirically using recently acquired data. The completed enhanced model is then validated using data acquired from a comprehensive novel set of installation tests carried out at QinetiQ’s Noise Test Facility.
McLaughlin, P.
e0179e13-72c6-484b-b963-069ba323bbcd
Self, R.
8b96166d-fc06-48e7-8c76-ebb3874b0ef7
Strange, P.
9381bd7c-dd0f-4dcf-b522-34d9ad74e5ad
Wrighton, C.
5c4fcad5-10ec-4f9b-a4df-768ca43ce4ea
McLaughlin, P.
e0179e13-72c6-484b-b963-069ba323bbcd
Self, R.
8b96166d-fc06-48e7-8c76-ebb3874b0ef7
Strange, P.
9381bd7c-dd0f-4dcf-b522-34d9ad74e5ad
Wrighton, C.
5c4fcad5-10ec-4f9b-a4df-768ca43ce4ea

McLaughlin, P., Self, R., Strange, P. and Wrighton, C. (2008) High frequency jet noise installation for an under wing mounted aircraft. Proceedings of the 14th AIAA/CEAS Aeroacoustics Conference (29th AIAA Aeroacoustics Conference). 05 - 07 May 2008. 18 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

This paper presents a generic 3-dimensional ray-theory based model to predict installation effects on a distributed jet source for aircraft with under-wing mounted engines. The model extends previous work by improving the hot jet blockage model from a 2-dimensional empirical model to a fully 3-dimensional semiempirical model. This new model is based on static rig test experiments described in this paper. Further improvements are made including variable directivity of the jet source (rather than an omni-directional assumption) which is important in predicting the correct reflection strengths for sources downstream from the nozzle. The directivity is determined both from analytic models and empirically using recently acquired data. The completed enhanced model is then validated using data acquired from a comprehensive novel set of installation tests carried out at QinetiQ’s Noise Test Facility.

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More information

Published date: May 2008
Additional Information: Paper Number: AIAA-2008-2997
Venue - Dates: Proceedings of the 14th AIAA/CEAS Aeroacoustics Conference (29th AIAA Aeroacoustics Conference), 2008-05-05 - 2008-05-07

Identifiers

Local EPrints ID: 57792
URI: https://eprints.soton.ac.uk/id/eprint/57792
PURE UUID: 649c38a3-65af-4929-8091-084f5b424bc1

Catalogue record

Date deposited: 20 Aug 2008
Last modified: 13 Mar 2019 20:33

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