A methodology for performing optimization on three-dimensional unstructured grids based on the Euler equations is presented. The same, low-memory-rest explicit relaxation algorithm is used to resolve the discrete equations that govern the flow, linearized direct, and adjoint problems. The analysis scheme is a high-resolution local-extremum-diminishing-type scheme that uses Roe decomposition for the dissipative fluxes. Mesh movement is performed in such a way that optimization of arbitrary geometries is allowed. The parallelization of the algorithm, which permits its extension to optimization of realistic, complete aircraft geometries, is presented. Two sample optimizations are performed. The first is the inverse design of a transonic wing/body configuration using a surface target pressure distribution found by analyzing the geometry for known design variable deflections. The second exercise is the inverse design of a business jet configuration consisting of wing, body, strut, nacelle, horizontal fin, and vertical fin. The surface target pressure distribution in this case is provided by an analysis of the configuration with no strut-nacelle.
Practical three-dimensional aerodynamic design and optimization using unstructured meshes
Praxisgerechter dreidimensionaler aerodynamischer Entwurf und Optimierung mit unstrukturierten Gitternetzen
AIAA Journal ; 35 , 9 ; 1479-1485
1997
7 Seiten, 13 Bilder, 2 Tabellen, 22 Quellen
Article (Journal)
English
Euler-Gleichung , Aerodynamik , dreidimensionale Strömung , Gitternetz , Parallelbetrieb , Algorithmus , Flugzeugbau , rechnerunterstützter Entwurf , Überschallströmung , Druckverteilung , Flugzeugrumpf , Tragfläche (Aerodynamik) , Verkehrsflugzeug , reibungsbehaftete Strömung , numerisches Verfahren , Rechnerprogramm , Optimierung
Practical Three-Dimensional Aerodynamic Design and Optimization Using Unstructured Meshes
Online Contents | 1997
|Aerodynamic Design Using Unstructured Meshes
British Library Conference Proceedings | 1996
|Aerodynamic design using unstructured meshes
AIAA | 1996
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