| Issue |
ESAIM: Proc.
Volume 16, 2007
CEMRACS 2005 - Computational Aeroacoustics and Computational Fluid Dynamics in Turbulent Flows
|
|
|---|---|---|
| Page(s) | 51 - 65 | |
| DOI | https://doi.org/10.1051/proc:2007009 | |
| Published online | 02 March 2007 | |
Shock-induced noise in 2D sub- and supersonic mixing layers
1
Technische Universität München, Germany.
2
École Centrale de Lyon, France.
A numerical code solving acoustic analogies to predict
shock-induced noise is developed. Both Lighthill's analogy and the one of
Ffowcs-Williams and Hawkings (FWH) are implemented and compared to the acoustic far
field of the direct numerical simulation (DNS) in detail. In addition to this
the linearized Euler Equations (LEE) are used to propagate into the acoustic far
field and the results are also compared to the DNS-data.
With a two
dimensional mixing layer in a subsonic test case and a Reynolds number based
on the initial shear layer thickness 
of
, a first application of the code is performed. To investigate the shock-induced noise, a two dimensional supersonic
mixing layer with an impinging oblique shock is simulated.
The results of the analogies for the shock-induced noise are in good agreement
with the acoustic far field of the DNS. The accuracy of the
FWH-method is better than the one of Lighthill's analogy.
Key words: Shock induced noise / Acoustic analogies / DNS
© EDP Sciences, ESAIM, 2007
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