title: Understanding jet noise.
abstract: Jets are one of the most fascinating topics in fluid mechanics. For aeronautics, turbulent jet-noise modelling is particularly challenging, not only because of the poor understanding of high Reynolds number turbulence, but also because of the extremely low acoustic efficiency of high-speed jets. Turbulent jet-noise models starting from the classical Lighthill acoustic analogy to state-of-the art models were considered. No attempt was made to present any complete overview of jet-noise theories. Instead, the aim was to emphasize the importance of sound generation and mean-flow propagation effects, as well as their interference, for the understanding and prediction of jet noise.
authors.affiliation: Whittle Laboratory, Department of Engineering, University of Cambridge, 1 JJ Thompson Avenue, Cambridge, UK. sak36@eng.cam.ac.uk
authors.forename: S A
authors.initials: SA
authors.lastname: Karabasov