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Efficient numerical simulation of aeroacoustics for low Mach number flows interacting with structures

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Abstract

An integrated hybrid approach for the numerical simulation of aeroacoustics at low Mach numbers is presented. The method is based on a viscous/acoustic splitting. The turbulent incompressible background flow is computed with large eddy simulation, based on the incompressible Navier-Stokes equations, whereas the acoustics are computed from linearized Euler equations with a high-resolution scheme. The focus is on the numerical efficiency of the approach. To accelerate the computations, hierarchical grids and a frozen fluid approach for the acoustics are employed and investigated. For validation and the investigation of the numerical efficiency and accuracy the sound emission of a plate in the turbulent wake of a circular cylinder is employed as a test case.

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Acknowledgments

Thanks are addressed to Frank Kameier from the University of Applied Science Düsseldorf as well as to Klaus Becker and Michael Winkler from the University of Applied Science Köln for the idea to study the cylinder-plate configuration and for providing the corresponding experimental results.

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Authors and Affiliations

  1. Institute of Numerical Methods in Mechanical Engineering, TU Darmstadt, Dolivostr. 15, 64293, Darmstadt, Germany

    Michael Kornhaas, Michael Schäfer & Dörte C. Sternel

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  1. Michael Kornhaas
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  2. Michael Schäfer
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  3. Dörte C. Sternel
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Correspondence to Michael Schäfer.

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Kornhaas, M., Schäfer, M. & Sternel, D.C. Efficient numerical simulation of aeroacoustics for low Mach number flows interacting with structures. Comput Mech 55, 1143–1154 (2015). https://doi.org/10.1007/s00466-014-1114-1

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  • DOI: https://doi.org/10.1007/s00466-014-1114-1

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