Contributions of computational aeroacoustics to jet noise research and prediction

A brief review of recent progress in the field of computational aeroacoustics (CAA) is proposed. This paper is complementary to the previous reviews of Tam [(1995a) Computational aeroacoustics: issues and methods, AIAA J. 33 (10), 1788-1796], Lele [(1997) Computational Aeroacoustics: a review, AIAA Paper 97-0018, 35th Aerospace Sciences Meeting and Exhibit , Reno, Nevada] and Glegg [(1999) Recent advances aeroacoustics: the influence of computational fluid dynamics, 6th International Congress on Sound and Vibration , Copenhagen, Danemark, 5-8 July, 43-58] on advances in CAA. After a short introduction concerning the current motivations of jet noise studies, connections between computational fluid dynamics (CFD) and CAA using hybrid approaches are discussed in the first part. The most spectacular advances are probably provided by the direct computation of jet noise, and some recent results are shown in the second part.