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dc.contributor.authorParsani, Matteo
dc.contributor.authorGhorbaniasl, Ghader
dc.contributor.authorLacor, C.
dc.date.accessioned2015-08-03T09:32:46Z
dc.date.available2015-08-03T09:32:46Z
dc.date.issued2011-11-21
dc.identifier.issn0218396X
dc.identifier.doi10.1142/S0218396X11004341
dc.identifier.urihttp://hdl.handle.net/10754/561863
dc.description.abstractThe main goal of this paper is to develop an efficient numerical algorithm to compute the radiated far field noise provided by an unsteady flow field from bodies in arbitrary motion. The method computes a turbulent flow field in the near fields using a high-order spectral difference method coupled with large-eddy simulation approach. The unsteady equations are solved by advancing in time using a second-order backward difference formulae scheme. The nonlinear algebraic system arising from the time discretization is solved with the nonlinear lowerupper symmetric GaussSeidel algorithm. In the second step, the method calculates the far field sound pressure based on the acoustic source information provided by the first step simulation. The method is based on the Ffowcs WilliamsHawkings approach, which provides noise contributions for monopole, dipole and quadrupole acoustic sources. This paper will focus on the validation and assessment of this hybrid approach using different test cases. The test cases used are: a laminar flow over a two-dimensional (2D) open cavity at Re = 1.5 × 10 3 and M = 0.15 and a laminar flow past a 2D square cylinder at Re = 200 and M = 0.5. In order to show the application of the numerical method in industrial cases and to assess its capability for sound field simulation, a three-dimensional turbulent flow in a muffler at Re = 4.665 × 10 4 and M = 0.05 has been chosen as a third test case. The flow results show good agreement with numerical and experimental reference solutions. Comparison of the computed noise results with those of reference solutions also shows that the numerical approach predicts noise accurately. © 2011 IMACS.
dc.description.sponsorshipThis research was funded by IWT under Project SBO 050163. This funding is gratefully acknowledged. The authors would also like to thank Michael Bilka, from the Department of Environmental and Applied Fluid Dynamics of the von Karman Institute for Fluid Dynamics, for making available the PIV data of the muffler test case.
dc.publisherWorld Scientific Pub Co Pte Lt
dc.subjectFfowcs WilliamsHawkings approach
dc.subjectHigh-order spectral difference
dc.subjectLES
dc.subjectnonlinear lowerupper symmetric GaussSeidel
dc.titleValidation and application of an high-order spectral difference method for flow induced noise simulation
dc.typeArticle
dc.contributor.departmentApplied Mathematics and Computational Science Program
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
dc.contributor.departmentExtreme Computing Research Center
dc.identifier.journalJournal of Computational Acoustics
dc.contributor.institutionDepartment of Mechanical Engineering, Fluid Mechanics and Thermodynamics Research Group, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussel, Belgium
kaust.personParsani, Matteo
dc.date.published-online2011-11-21
dc.date.published-print2011-09


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