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Numerical Modelling of Aerodynamic Noise in Compressible Flows

DOI: 10.4236/ojfd.2012.23007, PP. 65-69

Keywords: Computational Aeroacoustics, Noise, Pressure Waves, Cavity Noise

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Abstract:

The solution of the AeroAcoustics (CAA) problems by means of the Direct Numerical Simulation (DNS) or even the Large Eddy Simulation (LES) for a large computational domain is very time consuming and cannot be applied widely for engineering applications. In this paper the in-house CFD and CAA codes are presented. The in-house CFD code is based on the LES approach whereas the CAA code is an acoustic postprocessor solving the non-linearized Euler equations for fluctuating (acoustic) variables. These codes are used to solve the aerodynamically generated sound field by a flow over a rectangular cavity with inlet Mach number 0.53.

References

[1]  S. Dykas, W. Wróblewski and T. Chmielniak, “Using a CFD/CAA Technique for Aerodynamic Noise Assessment,” Proceedings of ASME Turbo Expo 2008: Power for Land, Sea and Air GT2008, Berlin, 9-13 June 2008, pp. 784-794.
[2]  S. Dykas, W. Wróblewski, S. Rulik and T. Chmielniak, “Numerical Modeling of the Acoustic Waves Propagation,” Archives of Acoustics, Vol. 35, No. 1, 2010, pp. 35-48.
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[4]  S. Weyna, “An Acoustic Energy Dissipation of the Real Sources (in Polish),” 2005.
[5]  W. Wróblewski, S. Dykas and A. Gepert, “Modeling of the Flows with Condensation (in Polish),” 2006.

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