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Computational elements for high-fidelity aerodynamic analysis and design optimisation

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Authors
Kim, Chongam
Issue Date
2010-11
Publisher
DEFENCE SCIENTIFIC INFORMATION DOCUMENTATION CENTRE
Citation
DEFENCE SCIENCE JOURNAL Vol.60 No.6, pp. 628-638
Keywords
복합학Aerodynamic shape optimisationhigh-fidelity numerical methodsgradient-based optimisation methodmeta modellinggenetic algorithmadjoint variable methodaerodynamic analysis
Abstract
The study reviews the role of computational fluid dynamics (CFD) in aerodynamic shape optimisation,
and discusses some of the efficient design methodologies. The article in the first part, numerical schemes
required for high-fidelity aerodynamic flow analysis are discussed. To accurately resolve high-speed flow
physics, high-fidelity shock-stable schemes as well as intelligent limiting strategy mimicking multi-dimensional
flow physics are essential. Exploiting these numerical schemes, some applications for 3-D internal/external
flow analyses were carried out with various grid systems which enable the treatment of complex geometries.
In the second part, depending on the number of design variables and the way to obtain sensitivities or design
points, several global and local optimisation methods for aerodynamic shape optimisation are discussed. To
avoid the problem that solutions of gradient-based optimisation method, (GBOM) are often trapped in local
optimum, remedy by combining GBOM with global optimum strategy, such as surrogate models and genetic
algorithm (GA) has been examined. As an efficient grid deformation tool, grid deformation technique using
NURBS function is discussed. Lastly, some 3-D examples for aerodynamic shape optimisation works based
on the proposed design methodology are presented.
ISSN
0011-748X
Language
English
URI
https://hdl.handle.net/10371/82300
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Mechanical Aerospace Engineering (기계항공공학부)Journal Papers (저널논문_기계항공공학부)
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