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Erschienen in:
2010 | OriginalPaper | Buchkapitel
On Sound Generated by a Globally Unstable Round Jet
verfasst von : G. Geiser, H. Foysi, W. Schröder, M. Meinke
Erschienen in: High Performance Computing on Vector Systems 2010
Verlag: Springer Berlin Heidelberg
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Direct numerical (DNS) and large-eddy simulations (LES) of a strongly heated globally unstable round jet are juxtaposed with respect to aerodynamical mean characteristics and the sound being generated. The sound field is computed by a hybrid approach using the acoustic perturbation equations (APE). All used codes have been adopted to massive-parallel supercomputers. This way results can be obtained in a reasonable time frame. When compared to the DNS results, the LES is capable to capture the major characteristics of the emitted sound field in the forward direction. The sideline and backward direction that are dominated by small scale noise reveal larger discrepancies that are due to the inherent restrictions of large eddy simulations.