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Optimal Shape Design of the S-Shaped Subsonic Intake using NURBS

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Authors
Lee, Byung Joon; Kim, Chongam; Rho, Oh-Hyun
Issue Date
2005-01
Publisher
AIAA
Citation
43rd AIAA Aerospace Science Meeting and Exhibit, 2005-455, pp. 1-17
Keywords
공학
Abstract
An optimal shape design approach is presented for a subsonic S-shaped intake using
aerodynamic sensitivity analysis. Two-equation turbulence model is adopted to predict the
strong counter vortices in the S-shaped duct more precisely. Sensitivity analysis is performed
for the three-dimensional Navier-Stokes equations coupled with two-equation turbulence
models using a discrete adjoint method. For code validation, the result of the flow solver is
compared with experiment data and bench marking data of other computation researches.
To study the influence of turbulence models and grid refinement in the duct flow analysis,
the results using several turbulence models are compared with each other on various grid
systems. The adjoint variable code is validated by comparison with the complex step
derivative results. And to guarantee a sufficient design space, NURBS equations are applied
as a geometric representation and a new grid modification technique, Least Square NURBS
Grid Approximation is proposed. Through several optimization cases for different objective
functions, the improvement of the intake performance is derived. And the capability and the
efficiency of the present design tools are successfully demonstrated in three-dimensional high
Reynolds turbulent subsonic intake design.
Language
English
URI
http://hdl.handle.net/10371/82398
DOI
https://doi.org/10.2514/6.2005-455
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Mechanical Aerospace Engineering (기계항공공학부)Others_기계항공공학부
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