Computer-aided liner optimization for broadband noise

Lafronza, L., McAlpine, A., Keane, A.J. and Astley, R.J. (2004) Computer-aided liner optimization for broadband noise. At 10th AIAA/CEAS Aeroacoustics Conference, Manchester, UK, 10 - 12 May 2004. American Institute of Aeronautics and Astronautics11pp.


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In this article the attenuation of brodband noise in an accoustically-lined circular-section dut is investigated. The aim is to predict how an axially segmented liner influences the attenuation of braodband noise in an aero-engine intake. The sound field is modelled using a multi-modal representation, assuming an ensemble of uncorrelated modes over a wide range of frequencies. An optimization procedure based on a Response Surface Model is used to investigate the optimum uniform and axially-segmented acoustic liner that maximizes the attenuation of braodband noise. An approximate calculation of the Perceived Noise level (PNL) is used for the objective function. In this arcticle the benefit of using an axially segmented liner instead of a uniform liner to attenuate broadband noise is demonstrated.

Item Type: Conference or Workshop Item (Speech)
Additional Information: AIAA 2004-3029
Related URLs:
Subjects: Q Science > QA Mathematics > QA76 Computer software
Q Science > QC Physics
T Technology > TL Motor vehicles. Aeronautics. Astronautics
Divisions : University Structure - Pre August 2011 > Institute of Sound and Vibration Research > Fluid Dynamics and Acoustics
University Structure - Pre August 2011 > School of Engineering Sciences
ePrint ID: 10396
Accepted Date and Publication Date:
Date Deposited: 06 Feb 2006
Last Modified: 31 Mar 2016 11:17

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