Journal of the Korean Society for Aeronautical & Space Sciences (한국항공우주학회지)

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
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Application of Store Separation Wind Tunnel Test Technique into CFD

외장분리 풍동시험 기법의 전산유체해석 적용

  • Received : 2020.10.23
  • Accepted : 2021.02.23
  • Published : 2021.04.01
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Abstract

In this study, aerodynamic coefficients obtained from Computational Fluid Dynamics (CFD) using wind tunnel test-like method is compared with coefficients obtained by actual wind tunnel test. Unsteady analysis has performed with using harmonic equation for motion of the external store. Aerodynamic database is generated based on CFD results to simulate 6 degree-of-freedom store separation analysis. Trajectory is obtained from simulation using both CFD-based and test-based database, and results are compared with trajectory from flight test result. It is concluded that generation of database based on CFD with wind tunnel test technique is valid from good agreement of the trajectory.

본 논문은 외장 분리 풍동시험 기법을 적용한 전산유체해석을 통하여 획득한 데이터와 풍동시험을 통하여 획득한 데이터를 비교 연구한 것이다. 전산유체해석은 하모닉 방정식을 적용한 비정상해석 기법을 사용하여 수행하였으며, 비정상 해석으로부터 외장의 공력계수들과 6 자유도 외장 분리 시뮬레이션을 위한 공력 데이터베이스를 생성하였다. 해당 데이터베이스와 풍동시험 기반 데이터베이스를 이용한 외장의 분리 궤적 시뮬레이션 수행하였으며, 그 결과를 비행시험 결과와 비교하였다. 비교를 통하여 시뮬레이션의 적절성을 확인하였으며, 외장 분리 풍동시험 기법을 전산유체해석에 적용하여 획득한 외장 분리 공력 데이터베이스는 외장분리 궤적 시뮬레이션 적용에 타당함을 확인하였다.

Keywords

References

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