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Predicting the noise of an open rotor in a wind tunnel

Predicting the noise of an open rotor in a wind tunnel
Predicting the noise of an open rotor in a wind tunnel

A study of the impact of reverberation on cruise regime acoustic testing of contra-rotating open rotors in a wind tunnel is presented. Models for the rotor tone noise generated in closed cross-section wind tunnels are derived and used in the analysis. The models account for rectangular and circular cross-sections, rigid or impedance boundaries and, for the rectangular wind tunnel case, the rotor axis may be arbitrarily located within the tunnel (but aligned with the flow direction). These models are used to generate simple simulations of model-scale open rotor testing in two real wind tunnels suited to high-speed rotor testing – the Transonic Wind Tunnel in Bedford, UK and the S1MA wind tunnel in Modane, France. In the analysis, the effect of various modelling parameters on the reverberant noise field is investigated. It is shown that open rotor interaction tone noise may be particularly susceptible to the impact of reverberation and that for many tones the reverberant field may persist and contribute to a contaminated noise field, even for wind tunnels with acoustic treatments on the walls of the working section.

duct acoustics, open rotors, Propeller noise, wind tunnels
1475-472X
1-30
Sureshkumar, Prathiban
7a49c777-1d0a-428a-b642-c046e9671a17
Kingan, Michael J.
2d2daafa-d6d7-41aa-a9fc-2307259ac9f0
Parry, Anthony B.
5fde3fdc-35a1-4788-afd8-4b69863c09fb
Sureshkumar, Prathiban
7a49c777-1d0a-428a-b642-c046e9671a17
Kingan, Michael J.
2d2daafa-d6d7-41aa-a9fc-2307259ac9f0
Parry, Anthony B.
5fde3fdc-35a1-4788-afd8-4b69863c09fb

Sureshkumar, Prathiban, Kingan, Michael J. and Parry, Anthony B. (2019) Predicting the noise of an open rotor in a wind tunnel. International Journal of Aeroacoustics, 1-30. (doi:10.1177/1475472X19852942).

Record type: Article

Abstract

A study of the impact of reverberation on cruise regime acoustic testing of contra-rotating open rotors in a wind tunnel is presented. Models for the rotor tone noise generated in closed cross-section wind tunnels are derived and used in the analysis. The models account for rectangular and circular cross-sections, rigid or impedance boundaries and, for the rectangular wind tunnel case, the rotor axis may be arbitrarily located within the tunnel (but aligned with the flow direction). These models are used to generate simple simulations of model-scale open rotor testing in two real wind tunnels suited to high-speed rotor testing – the Transonic Wind Tunnel in Bedford, UK and the S1MA wind tunnel in Modane, France. In the analysis, the effect of various modelling parameters on the reverberant noise field is investigated. It is shown that open rotor interaction tone noise may be particularly susceptible to the impact of reverberation and that for many tones the reverberant field may persist and contribute to a contaminated noise field, even for wind tunnels with acoustic treatments on the walls of the working section.

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SURESHKUMAR 2018 Predicting the Noise of an Open Rotor in a Wind Tunnel IJA REVISED - Accepted Manuscript
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Accepted/In Press date: 6 February 2019
e-pub ahead of print date: 11 June 2019
Keywords: duct acoustics, open rotors, Propeller noise, wind tunnels

Identifiers

Local EPrints ID: 432710
URI: http://eprints.soton.ac.uk/id/eprint/432710
ISSN: 1475-472X
PURE UUID: 8c8d609d-2406-4f7b-a826-ad97edbbee0b

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Date deposited: 24 Jul 2019 16:30
Last modified: 07 Oct 2020 00:24

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