The University of Southampton
University of Southampton Institutional Repository

Broadband noise due to rotor-wake/rotor interaction in contra-rotating open rotors

Broadband noise due to rotor-wake/rotor interaction in contra-rotating open rotors
Broadband noise due to rotor-wake/rotor interaction in contra-rotating open rotors
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 open rotors is presented. The unsteady loading of the rear rotor is modeled 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 turbulence that is modulated by a train of wake profiles. The model is presented in detail and insight into its modal behavior is provided. A parameter study is conducted to investigate the effects of blade number, rotor–rotor gap and rotor speeds on broadband noise emissions due to rotor–wake/rotor interaction in contra-rotating open rotors. Scaling laws for sound power levels have been established analytically and show good agreement with the results of the parameter study
0001-1452
2674-2686
Blandeau, Vincent P.
4c3c0b38-4ebb-4d24-a647-267c6010f77d
Joseph, Phillip F.
9c30491e-8464-4c9a-8723-2abc62bdf75d
Blandeau, Vincent P.
4c3c0b38-4ebb-4d24-a647-267c6010f77d
Joseph, Phillip F.
9c30491e-8464-4c9a-8723-2abc62bdf75d

Blandeau, Vincent P. and Joseph, Phillip F. (2010) Broadband noise due to rotor-wake/rotor interaction in contra-rotating open rotors. AIAA Journal, 48 (11), 2674-2686. (doi:10.2514/1.J050566).

Record type: Article

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 open rotors is presented. The unsteady loading of the rear rotor is modeled 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 turbulence that is modulated by a train of wake profiles. The model is presented in detail and insight into its modal behavior is provided. A parameter study is conducted to investigate the effects of blade number, rotor–rotor gap and rotor speeds on broadband noise emissions due to rotor–wake/rotor interaction in contra-rotating open rotors. Scaling laws for sound power levels have been established analytically and show good agreement with the results of the parameter study

Text
__userfiles.soton.ac.uk_Users_nl2_mydesktop_REF_files_166199JOSEPH15.pdf - Version of Record
Restricted to Repository staff only
Request a copy

More information

Published date: November 2010
Organisations: Fluid Dynamics & Acoustics Group

Identifiers

Local EPrints ID: 166199
URI: https://eprints.soton.ac.uk/id/eprint/166199
ISSN: 0001-1452
PURE UUID: 64213779-e71c-4a34-b905-3a22d9ca13bb

Catalogue record

Date deposited: 26 Oct 2010 08:29
Last modified: 14 Aug 2019 19:01

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×