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Design Optimization of Vortex Generator for a Junction Vortex of Wing-Body Configuration by Discrete Adjoint Approach

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Authors
Yi, JunSok; Kim, Chongam
Issue Date
2013-01
Publisher
AIAA
Citation
51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, 2013-0634, pp. 1-22
Keywords
공학
Abstract
This paper deals with an adjoint-based design optimization of vortex generators to
control a junction vortex of wing-body aircraft. The target geometry isthe DLR-F6, which is
known to have some undesirable flow features caused by a wing-body junction vortex; thus,
a vortex generator was adopted and optimized to eliminate the junction vortex without
additional geometric parts,such asfairings. To enhance computational efficiency, the effects
of the vortex generator were presented as a mathematical source term model instead of a
fully gridded vortex generator. To check out the flow characteristics of the wing-body
junction and to confirm the effects of the vortex generator in handling the junction vortex,
nine cases of parametric study were performed at first and three baseline configurations
were selected. Gradient based design optimizations using discrete adjoint approach were
then performed with five design parameters of the chord length, the height, the angle of
incidence, the streamwise (x-directional) position, and the wing spanwise (y-directional) or
body circumferential (z-directional) position of the vortex generators. As a result of the
parametric study, the lift to drag ratio (L/D) of the DLR-F6 increased a maximum of 4%
under the same flight conditions. After carrying out the optimization of the vortex
generators, the junction vortex was shrunk and weakened enough; thus, the aerodynamic
performance of the DLR-F6 was substantially improved over 5% even in operating offdesign conditions.
Language
English
URI
http://hdl.handle.net/10371/82445
DOI
https://doi.org/10.2514/6.2013-634?prevSearch=&searchHistoryKey=
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Mechanical Aerospace Engineering (기계항공공학부)Others_기계항공공학부
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