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Using an inflow turbulence generator for leading edge noise predictions

Using an inflow turbulence generator for leading edge noise predictions
Using an inflow turbulence generator for leading edge noise predictions
Inflow turbulence noise is often the dominant noise mechanism in turbomachines. It has been shown that the sound pressure level is related to the intensity and integral length scale of the turbulence. We utilise a methodology for generating turbulence with prescribed intensity and length scales within a detached eddy simulation. This is applied to a case of homogeneous isotropic turbulence impinging on a non-symmetric aerofoil at high Reynolds number (210000). The sound pressure level is estimated using Curle’s compact acoustic analogy, and compared to experimental data and analytical estimates. The intensity of the inflow turbulence is higher than expected, though it exhibits approximately homogeneous and isotropic characteristics. While the general shape of the predicted noise spectrum is correct, the magnitude differs from the experimental results by up to 17 dB. Reasons for this are elaborated, and improved predictions based on a flat plate are presented.
978-3-319-01860-7
211-215
Springer Verlag
Lloyd, T.P.
325dbac1-dd5c-47a6-b2ae-1b9f4c5883e6
Gruber, M.
2050cede-6c5f-46e2-819d-678db2f639ba
Turnock, S.R.
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
Humphrey, V.F.
23c9bd0c-7870-428f-b0dd-5ff158d22590
Talamelli, A.
Oberlack, M.
Peinke, J.
Lloyd, T.P.
325dbac1-dd5c-47a6-b2ae-1b9f4c5883e6
Gruber, M.
2050cede-6c5f-46e2-819d-678db2f639ba
Turnock, S.R.
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
Humphrey, V.F.
23c9bd0c-7870-428f-b0dd-5ff158d22590
Talamelli, A.
Oberlack, M.
Peinke, J.

Lloyd, T.P., Gruber, M., Turnock, S.R. and Humphrey, V.F. (2014) Using an inflow turbulence generator for leading edge noise predictions. Talamelli, A., Oberlack, M. and Peinke, J. (eds.) In Progress in Turbulence V: Proceedings of the iTi Conference in Turbulence, 2012. Springer Verlag. pp. 211-215 . (doi:10.1007/978-3-319-01860-7_34).

Record type: Conference or Workshop Item (Paper)

Abstract

Inflow turbulence noise is often the dominant noise mechanism in turbomachines. It has been shown that the sound pressure level is related to the intensity and integral length scale of the turbulence. We utilise a methodology for generating turbulence with prescribed intensity and length scales within a detached eddy simulation. This is applied to a case of homogeneous isotropic turbulence impinging on a non-symmetric aerofoil at high Reynolds number (210000). The sound pressure level is estimated using Curle’s compact acoustic analogy, and compared to experimental data and analytical estimates. The intensity of the inflow turbulence is higher than expected, though it exhibits approximately homogeneous and isotropic characteristics. While the general shape of the predicted noise spectrum is correct, the magnitude differs from the experimental results by up to 17 dB. Reasons for this are elaborated, and improved predictions based on a flat plate are presented.

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More information

Published date: 2014
Venue - Dates: conference; 2014-01-01, 2014-01-01
Organisations: Acoustics Group, Fluid Structure Interactions Group

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Local EPrints ID: 359257
URI: http://eprints.soton.ac.uk/id/eprint/359257
ISBN: 978-3-319-01860-7
PURE UUID: a1e7de22-3c24-44c3-a6de-673504acb8ce
ORCID for S.R. Turnock: ORCID iD orcid.org/0000-0001-6288-0400
ORCID for V.F. Humphrey: ORCID iD orcid.org/0000-0002-3580-5373

Catalogue record

Date deposited: 24 Oct 2013 13:30
Last modified: 08 Jan 2022 02:58

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Contributors

Author: T.P. Lloyd
Author: M. Gruber
Author: S.R. Turnock ORCID iD
Author: V.F. Humphrey ORCID iD
Editor: A. Talamelli
Editor: M. Oberlack
Editor: J. Peinke

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