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Broadband noise prediction from wake-rotor interaction in contra-rotating propfans

Broadband noise prediction from wake-rotor interaction in contra-rotating propfans
Broadband noise prediction from wake-rotor interaction in contra-rotating propfans
A semi-analytical model for the prediction of the broadband noise due to the interaction
between turbulent rotor wakes and a rotor in contra-rotating propfans (CRPs) is presented.
The unsteady loading of the rear rotor is modelled using classical isolated flat-plate theory.
Strip theory is used to treat the spanwise variations of aerodynamic quantities and blade
geometry. The turbulent wake is assumed to be homogeneous and isotropic that is modulated
by a wake train of wake profiles and is modelled using an analytical 3D turbulent
velocity spectrum (Von Karman’s model). The model is presented in detail and insight into
its modal behaviour is provided. Predictions and measurements differ by no better than
14dB. This may indicate the presence of other broadband noise sources or measurement
error due to the facility
American Institute of Aeronautics and Astronautics
Blandeau, Vincent P.
4c3c0b38-4ebb-4d24-a647-267c6010f77d
Joseph, Phillip J.
9c30491e-8464-4c9a-8723-2abc62bdf75d
Tester, Brian J.
1bd4a793-131b-4173-93cc-3eca70b2d116
Blandeau, Vincent P.
4c3c0b38-4ebb-4d24-a647-267c6010f77d
Joseph, Phillip J.
9c30491e-8464-4c9a-8723-2abc62bdf75d
Tester, Brian J.
1bd4a793-131b-4173-93cc-3eca70b2d116

Blandeau, Vincent P., Joseph, Phillip J. and Tester, Brian J. (2009) Broadband noise prediction from wake-rotor interaction in contra-rotating propfans. In Proceedings of the 15th AIAA/CEAS Aeroacoustics Conference (30th AIAA Aeroacoustics Conference). American Institute of Aeronautics and Astronautics..

Record type: Conference or Workshop Item (Paper)

Abstract

A semi-analytical model for the prediction of the broadband noise due to the interaction
between turbulent rotor wakes and a rotor in contra-rotating propfans (CRPs) is presented.
The unsteady loading of the rear rotor is modelled using classical isolated flat-plate theory.
Strip theory is used to treat the spanwise variations of aerodynamic quantities and blade
geometry. The turbulent wake is assumed to be homogeneous and isotropic that is modulated
by a wake train of wake profiles and is modelled using an analytical 3D turbulent
velocity spectrum (Von Karman’s model). The model is presented in detail and insight into
its modal behaviour is provided. Predictions and measurements differ by no better than
14dB. This may indicate the presence of other broadband noise sources or measurement
error due to the facility

Full text not available from this repository.

More information

Published date: 2009
Venue - Dates: 15th AIAA/CEAS Aeroacoustics Conference (30th AIAA Aeroacoustics Conference), 2009-05-11 - 2009-05-13

Identifiers

Local EPrints ID: 71518
URI: https://eprints.soton.ac.uk/id/eprint/71518
PURE UUID: e95b242d-0cae-4d37-826d-2b787838dcdc

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Date deposited: 17 Feb 2010
Last modified: 13 Dec 2018 11:03

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