Recent improvements in an unstructured-grid method for large-scale aerodynamic design re presented. Previous work had shown such computations to be prohibitively long in a sequential processing environment. Also, robust adjoint solutions and mesh movement procedures were difficult to realize, particularly for viscous flows. To overcome these limiting factors, a set of design codes based on a discrete adjoint method is extended to a multiprocessor environment using a shared memory approach. A nearly linear speedup is demonstrated, and the consistency of the linearizations is shown to remain valid. The full linearization of the residual is used to precondition the adjoint system, and a significantly improved convergence rate is obtained. A new mesh movement algorithm is implemented, and several advantages over an existing technique are presented. Several design cases are shown for turbulent flows in two and three dimensions.
Recent improvements in aerodynamic design optimization on unstructured meshes
Neue Verbesserungen auf dem Gebiet der aerodynamischen Optimierung mit heterogen strukturierten Gitternetzen
AIAA Journal ; 40 , 6 ; 1155-1163
2002
9 Seiten, 26 Bilder, 3 Tabellen, 26 Quellen
Article (Journal)
English
FLUID DYNAMICS - Recent Improvements in Aerodynamic Design Optimization on Unstructured Meshes
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