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The Reduction of Sound from Aircraft Engines

In: UK Success Stories in Industrial Mathematics

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  • C. John Chapman

    (University of Keele, Department of Mathematics)

Abstract

This work concerned the noise produced by the fan of a turbofan aeroengine, with particular account taken of the effect of the duct. A mathematical approach based on ray theory was developed, in which the key result was that the rays propagate on piecewise linear helices, and produce Keller cones of diffracted rays on striking the rim of the front face of the duct. This ray description was taken up by aeroacoustics research workers at Cambridge University, Southampton University, and Rolls-Royce (Derby), and was used as underpinning theory for many of their research programmes aimed at producing quieter aircraft engines.

Suggested Citation

  • C. John Chapman, 2016. "The Reduction of Sound from Aircraft Engines," Springer Books, in: Philip J. Aston & Anthony J. Mulholland & Katherine M.M. Tant (ed.), UK Success Stories in Industrial Mathematics, edition 1, pages 117-123, Springer.
    • Handle: RePEc:spr:sprchp:978-3-319-25454-8_15
    DOI: 10.1007/978-3-319-25454-8_15
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