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Turbulence-cascade interaction noise using an advanced digital filter method

Turbulence-cascade interaction noise using an advanced digital filter method
Turbulence-cascade interaction noise using an advanced digital filter method
Fan wakes interacting with outlet guide vanes is a major source of noise in modern turbofan engines. In order to study this source of noise, the current work presents two-dimensional simulations of turbulence-cascade interaction noise using a computational aeroacoustic methodology. An advanced digital filter method is used for the generation of isotropic synthetic turbulence in a linearised Euler equation solver. A parameter study is presented to assess the influence of airfoil thickness, mean flow Mach number, stagger angle and gap-to-chord ratio on noise. Results are validated against predictions from an analytical method for two-dimensional flat plate cascades. Fan wake modelling is also addressed by extending the advanced digital filter method to account for spatial variations of the turbulence intensity
Gea Aguilera, Fernando
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Gill, James
1e31eb24-f833-462e-b610-23b5b28e7285
Zhang, Xin
3056a795-80f7-4bbd-9c75-ecbc93085421
Nodé-Langlois, Thomas
e0110d6a-9623-4e58-b27d-78d4a49f1743
Gea Aguilera, Fernando
8aaa69d6-7618-4b2e-9942-e1ab4084aba4
Gill, James
1e31eb24-f833-462e-b610-23b5b28e7285
Zhang, Xin
3056a795-80f7-4bbd-9c75-ecbc93085421
Nodé-Langlois, Thomas
e0110d6a-9623-4e58-b27d-78d4a49f1743

Gea Aguilera, Fernando, Gill, James, Zhang, Xin and Nodé-Langlois, Thomas (2016) Turbulence-cascade interaction noise using an advanced digital filter method. 23rd International Congress on Sound & Vibration, , Athens, Greece. 10 - 14 Jul 2016. 8 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

Fan wakes interacting with outlet guide vanes is a major source of noise in modern turbofan engines. In order to study this source of noise, the current work presents two-dimensional simulations of turbulence-cascade interaction noise using a computational aeroacoustic methodology. An advanced digital filter method is used for the generation of isotropic synthetic turbulence in a linearised Euler equation solver. A parameter study is presented to assess the influence of airfoil thickness, mean flow Mach number, stagger angle and gap-to-chord ratio on noise. Results are validated against predictions from an analytical method for two-dimensional flat plate cascades. Fan wake modelling is also addressed by extending the advanced digital filter method to account for spatial variations of the turbulence intensity

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More information

Accepted/In Press date: 28 February 2016
Published date: 11 July 2016
Venue - Dates: 23rd International Congress on Sound & Vibration, , Athens, Greece, 2016-07-10 - 2016-07-14
Organisations: Aerodynamics & Flight Mechanics Group

Identifiers

Local EPrints ID: 398173
URI: http://eprints.soton.ac.uk/id/eprint/398173
PURE UUID: 880f3956-29ac-4f3c-82ea-1d67d677707d

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Date deposited: 21 Jul 2016 10:43
Last modified: 15 Mar 2024 18:34

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Contributors

Author: Fernando Gea Aguilera
Author: James Gill
Author: Xin Zhang
Author: Thomas Nodé-Langlois

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