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Aerodynamic Shape Optimization Based on Free-form DeformationThis paper presents a free-form deformation technique suitable for aerodynamic shape optimization. Because the proposed technique is independent of grid topology, we can treat structured and unstructured computational fluid dynamics grids in the same manner. The proposed technique is an alternative shape parameterization technique to a trivariate volume technique. It retains the flexibility and freedom of trivariate volumes for CFD shape optimization, but it uses a bivariate surface representation. This reduces the number of design variables by an order of magnitude, and it provides much better control for surface shape changes. The proposed technique is simple, compact, and efficient. The analytical sensitivity derivatives are independent of the design variables and are easily computed for use in a gradient-based optimization. The paper includes the complete formulation and aerodynamics shape optimization results.
Document ID
20040110340
Acquisition Source
Langley Research Center
Document Type
Preprint (Draft being sent to journal)
Authors
Samareh, Jamshid A. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 7, 2013
Publication Date
July 26, 2004
Subject Category
Aircraft Design, Testing And Performance
Meeting Information
Meeting: 10th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference
Location: Albany, NY
Country: United States
Start Date: August 30, 2004
End Date: September 1, 2004
Sponsors: International Society for Structural and Multidisciplinary Optimization, American Inst. of Aeronautics and Astronautics
Funding Number(s)
OTHER: 762-45-CG
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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