Wednesday Morning, October 25
MS30
Issues and Methods in Computational Aeroacoustics
The recent and developing field of computational aeroacoustics (CAA) is a
discipline in which the prediction of acoustics is obtained with the aid of
computational algorithms. In most applications, both the source of the sound as
well as its far-field propagation must be predicted. As computers have become
more powerful and aerodynamic simulation codes more reliable, the trend is to use
computational fluid dynamics (CFD) code for the near-field solution. The
far-field noise is then determined through the use of the CFD data and an
analytical method. The two most useful analytical methods to date are the
acoustic analogy and Kirchhoff methods. The speakers will present the current
state of the art of these two methods, as well as more recent developments in
far-field sonic boom prediction and the direct numerical simulation of
shock-induced sound.
Organizer: Jay Casper
Old Dominion University
- 8:00 Acoustic Analogy in Computational Aeroacoustics
- Fereidoun Farassat, NASA Langley Research Center
- 8:30 The Use of Kirchhoff's Method in Computational Aeroacoustics
- Anastasios S. Lyrintzis, Purdue University
- 9:00 Sonic Boom Extrapolation by Method of Characteristics
- Samson Cheung, NASA Ames Research Center
- 9:30 Issues in the Simulation of Shock-Induced Sound
- Jay Casper, Organizer; Mark Carpenter, NASA Langley Research Center; Oktay Baysal and Dinesh Kaushik, Old Dominion University
7/27/95