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Effect of Approximations of the Discrete Adjoint on Gradient-Based Optimization

Dwight, Richard and Brezillon, Joel (2006) Effect of Approximations of the Discrete Adjoint on Gradient-Based Optimization. AIAA Journal, 44 (12), pp. 3022-3071.

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Abstract

An exact discrete adjoint of an unstructured nite-volume solver for the RANS equations has been developed. The adjoint is exact in the sense of being based on the full linearization of all terms in the solver, including all turbulence model contributions. From this starting point various approximations to the adjoint are derived with the intention of simplifying the development and memory requirements of the method; considered are many approximations already seen in the literature. The eect of these approximations on the accuracy of the resulting design gradients, and the convergence and nal solution of optimizations is studied, as it applies to a two-dimensional high-lift conguration.

Item URL in elib:https://elib.dlr.de/50782/
Document Type:Article
Title:Effect of Approximations of the Discrete Adjoint on Gradient-Based Optimization
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Dwight, RichardUNSPECIFIEDUNSPECIFIED
Brezillon, JoelUNSPECIFIEDUNSPECIFIED
Date:December 2006
Journal or Publication Title:AIAA Journal
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:44
Page Range:pp. 3022-3071
Status:Published
Keywords:discrete adjoint. optimization, gradient based
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignment
DLR - Research theme (Project):L - no assignment (old)
Location: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > CASE
Deposited By: Dwight, Dr.(PH.D.) Richard
Deposited On:11 Sep 2007
Last Modified:31 Jul 2019 19:20

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