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On Computations of third CAA workshop benchmark problems

Yin, J. and Delfs, J. (2000) On Computations of third CAA workshop benchmark problems. 3rd computational aeroacoustics (CAA) workshop on benchmark problems, Ohio (USA), 08.-10.11.1999.

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The high order Dispersion-Relation-Preserving (DRP) scheme is used to solve the first two category 1 problems of the third CAA Benchmark workshop. The perturbation equations about the mean flow are used as governing equations in solving two problems. Special non-homogeneous inflow and outflow boundary conditions are derived to generate incoming or outgoing disturbances. In order to create accurate results and keep a minimum number of grid points, a non-uniform grid system in which neighboring mesh sizes differ by a factor of 2 are used. In the area of grid interface, a combination of Tam & Webb DRP and Lele's cell-centered high order differencing scheme are implemented, not requiring any interpolation. Large oscillations typically produced by high order spatial schemes when the stencil extends across a discontinuity such as a shock are avoided by introducing three methods, namely shock perturbation relation method (SPRM), averaged mean flow discontinuity method (AMFDM) and limiter method (LM). The mean flow solutions are obtained analytically by using one dimensional isentropic flow as well as the shock relations.

Item URL in elib:https://elib.dlr.de/13047/
Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2005,
Title:On Computations of third CAA workshop benchmark problems
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 203-216
Series Name:NASA/CP-2000-209790
Keywords:Computational Aeroacoustic (CAA), Benchmark problem, DRP, non-uniform grid, shock perturbation relation method, averaged mean flow discontinuity method, limiter method
Event Title:3rd computational aeroacoustics (CAA) workshop on benchmark problems, Ohio (USA), 08.-10.11.1999
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Rotorcraft (old)
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):L - The Quiet and Comfortable Rotorcraft (old)
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology
Deposited By: Grant, Claudia
Deposited On:31 Jan 2006
Last Modified:14 Jan 2010 19:53

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