The KSFM Journal of Fluid Machinery (한국유체기계학회 논문집)

Korean Society for Fluid machinery (한국유체기계학회)
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A Study on Reliability of Kriging Based Approximation Model and Aerodynamic Optimization for Turbofan Engine High Pressure Turbine Nozzle

터보팬 엔진 고압터빈 노즐에 대한 크리깅 모델 기반 근사모델의 신뢰도 및 공력성능 최적화 연구

  • Lee, Sanga (Department of Mechanical & Aerospace Engineering, Seoul National University) ;
  • Lee, Saeil (Department of Mechanical & Aerospace Engineering, Seoul National University) ;
  • Kang, Young-Seok (Korea Aerospace Research Institute) ;
  • Rhee, Dong-Ho (Korea Aerospace Research Institute) ;
  • Lee, Dong-Ho (Institute of Advenced Aerospace Technology, Department of Mechanical & Aerospace Engineering, Seoul National University) ;
  • Kim, Kyu-Hong (Department of Mechanical & Aerospace Engineering, Seoul National University)
  • 이상아 (서울대학교 기계항공공학부) ;
  • 이세일 (서울대학교 기계항공공학부) ;
  • 강영석 (한국항공우주연구원 항공추진기관팀) ;
  • 이동호 (한국항공우주연구원 항공추진기관팀) ;
  • 이동호 (서울대학교 기계항공공학부 항공우주신기술연구소) ;
  • 김규홍 (서울대학교 기계항공공학부)
  • Received : 2013.07.16
  • Accepted : 2013.11.11
  • Published : 2013.12.01
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Abstract

In the present study, three-dimensional aerodynamic optimization of high pressure turbine nozzle for turbofan engine was performed. For this, Kriging surrogate model was built and refined iteratively by supplying additional experimental points until the surrogate model and CFX result has effective difference on objective function. When the surrogate model satisfied this reliability condition and developed enough, optimum point was investigated. Commercial program PIAnO was used for optimization process and evolutionary algorithm was used for searching optimum point. As a result, difference between estimated value from Kriging surrogate model and CFD result converges within 0.01% and the optimized nozzle shape has 0.83% improved aerodynamic efficiency.

Keywords

References

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