Noise generation by a supersonic leading edge. Part 2: Examples of two-dimensional sound fields

Powles, C.J. (2004) Noise generation by a supersonic leading edge. Part 2: Examples of two-dimensional sound fields. Journal of Sound and Vibration, 276 (3-5), 853-868. (doi:10.1016/j.jsv.2003.11.041).

Record type: Article

Abstract

Formulae for the calculation of the sound fields generated by the interaction between a flat-plate semi-infinite aerofoil and a convected vortical gust in a supersonic mean flow have been developed in part 1. Now the special case of two-dimensional sound fields is considered, and specific examples are given. The examples include a periodic gust, transient gusts, and the problem of a line vortex sweeping past the aerofoil. Study of the resulting fields gives insight into the general behaviour which may be expected. The two-dimensional results are important in the study of complicated three-dimensional fields, as the near-fields often contain a region in which the field is two dimensional.

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