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http://dx.doi.org/10.5139/IJASS.2017.18.3.403

Multi-Point Aerodynamic Design Optimization of DLR F-6 Wing-Body-Nacelle-Pylon Configuration  

Saitoh, Takashi (Department of Aerospace Engineering, Tohoku University)
Kim, Hyoungjin (Department of Mechanical Engineering, Kyung Hee University)
Takenaka, Keizo (Department of Aerospace Engineering, Tohoku University)
Nakahashi, Kazuhiro (Department of Aerospace Engineering, Tohoku University)
Publication Information
International Journal of Aeronautical and Space Sciences / v.18, no.3, 2017 , pp. 403-413 More about this Journal
Abstract
Dual-point aerodynamic design optimization is conducted for DLR-F6 wing-body-nacelle-pylon configuration adopting an efficient surface mesh movement method for complex junction geometries. A three-dimensional unstructured Euler solver and its discrete adjoint code are utilized for flow and sensitivity analysis, respectively. Considered design conditions are a low-lift condition and a cruise condition in a transonic regime. Design objective is to minimize drag and reduce shock strength at both flow conditions. Shape deformation is made by variation of the section shapes of inboard wing and pylon, nacelle vertical location and nacelle pitch angle. Hicks-Henne shape functions are employed for deformation of the section shapes of wing and pylon. By the design optimization, drag coefficients were remarkably reduced at both design conditions retaining specified lift coefficient and satisfying other constraints. Two-point design results show mixed features of the one-point design results at low-lift condition and cruise conditions.
Keywords
Unstructured grid; Aerodynamic design optimization; Adjoint method; Multi-point design;
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