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전산유체역학을 이용한 비행체의 피치와 롤 동안정 미계수 예측

Prediction of Pitch and Roll Dynamic Derivatives for Flight Vehicle using CFD

  • 이형로 (인하대학교 항공우주공학과) ;
  • 공효준 (인하대학교 항공우주공학과) ;
  • 김범수 (인하대학교 항공.조선.산업공학부) ;
  • 이승수 (인하대학교 항공.조선.산업공학부)
  • 투고 : 2012.02.02
  • 심사 : 2012.04.23
  • 발행 : 2012.05.01

초록

본 논문에서는 전산유체역학을 이용하여 3차원 비행체 형상에 대한 동안정 미계수를 예측하였다. 피치에 대한 미계수는 피치방향의 조화진동운동을 통하여 계산하였고 롤 감쇠계수는 비관성 좌표계에 대한 정상해석을 통하여 계산하였다. 계산은 Basic Finner와 SDM 형상에 대해 수행했으며 다른 연구자의 실험적/수치적 결과와 비교하였다. 유동 계산을 위해 비관성 좌표계와 관성 좌표계에서 모두 사용할 수 있는 3차원 Euler 해석자를 개발하였다. 시간 정확성을 유지한 비정상 해석을 위해 이중시간적분법을 적용하였다. 동안정 미계수계산 결과는 다른 수치 및 실험적 연구 결과들과 잘 일치하는 것을 알 수 있었다.

This paper presents computations of the dynamic derivatives of three dimensional flight vehicle configurations using CFD. The pitch dynamic derivatives are computed from the pitch sinusoidal motion, while the roll damping is computed based on steady state calculation using a non-inertial frame method. The Basic Finner and the SDM(Standard Dynamic Model) are chosen for the benchmark tests against other numerical and experimental results. For the flow calculations, a 3-D Euler solver that can be run both on the non-inertial frame and on the inertial frame is developed. A dual-time stepping method is applied for the unsteady time accurate simulations. A good agreement of pitch-roll dynamic derivatives with previously published numerical results and the experimental results is observed.

키워드

참고문헌

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피인용 문헌

  1. Estimation of Longitudinal Dynamic Stability Derivatives for a Tailless Aircraft Using Dynamic Mesh Method vol.43, pp.3, 2015, https://doi.org/10.5139/JKSAS.2015.43.3.232