Asymptotic approach to aeroacoustics

Linda Winkrantz Hogg
The present thesis is concerned with mechanisms of sound generation by unsteady hydrodynamic motions in shear flows. Such problems are of great importance for the aviation industry, where noise reduction has long been a serious concern. The current state of the art in this field primarily rests on the acoustic analogy theory initiated by Lighthill (1952) and its numerous variants. An alternative method, based on matched asymptotic expansions, was developed by Crow (1970) among others....
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