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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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Abstract

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.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2005,
Title:On Computations of third CAA workshop benchmark problems
Authors:
AuthorsInstitution or Email of Authors
Yin, J.UNSPECIFIED
Delfs, J.UNSPECIFIED
Date:2000
Page Range:pp. 203-216
Series Name:NASA/CP-2000-209790
Status:Published
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
Organizer:Nasa
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Rotorcraft
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):L - The Quiet and Comfortable Rotorcraft
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology
Deposited By: Claudia Grant
Deposited On:31 Jan 2006
Last Modified:14 Jan 2010 19:53

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