Journal of Mechanical Science and Technology

, Volume 24, Issue 2, pp 601–608 | Cite as

Reduced order model of three-dimensional Euler equations using proper orthogonal decomposition basis

  • Sangook Jun
  • Kyung-Hyun Park
  • Hyung-Min Kang
  • Dong-Ho Lee
  • Maenghyo Cho
Article

Abstract

This study seeks to validate the accuracy and the efficiency of the aerodynamic reduced order model (ROM). In doing this, snapshot data are generated from the full system analysis of a fighter wing problem. From an eigensystem analysis of these snapshots, the basis vector reproducing the behavior of the full system is obtained. The span length, sweep angle, dihedral angle, and spar and rib thickness representing the wing configuration are determined as the input variables. The constructed ROM is applied to the fighter wing problem while varying the input conditions for validation. Subsequently, a comparison of the reduced system with the full system confirmed that the aerodynamic performance is within 4% error and that the L2 norms are 10−6 order of the entire flow field. Therefore, the ROM is able to capture the variation of the aerodynamic performance with respect to the input variables. Though there are structural input variables which influence the aerodynamic performance indirectly, the ROM can reproduce the flow field of the full system. Additionally, even if the ROM incurs a high computational cost to generate snapshots, it can represent the behavior of the full system efficiently once the reduced order model is constructed.

Keywords

Aerodynamics/structure coupling analysis Proper orthogonal decomposition Reduced order model Wing-fuselage system 

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Copyright information

© The Korean Society of Mechanical Engineers and Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Sangook Jun
    • 1
  • Kyung-Hyun Park
    • 1
  • Hyung-Min Kang
    • 1
  • Dong-Ho Lee
    • 2
  • Maenghyo Cho
    • 1
  1. 1.School of Mechanical and Aerospace EngineeringSeoul National UniversitySeoulKorea
  2. 2.School of Mechanical and Aerospace Engineering/Institute of Advanced Aerospace TechnologySeoul National UniversitySeoulKorea

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