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

  • 제30권2호
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  • Pages.12-20
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  • 2002
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  • 1225-1348(pISSN)
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  • 2287-6871(eISSN)
한국항공우주학회 (The Korean Society for Aeronautical and Space Sciences)
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천음속 미사일의 동안정성에 대한 충격파 영향

Effect of Shock Waves on Dynamic Stability of Transonic Missiles

  • 발행 : 2002.04.30
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초록

천음속 미사일에 대한 동안정 미계수 예측을 위해 비정상 Euler 방정식 해석을 수행하고, 동안정 미계수를 구하기 위한 적분방법을 제시하였다. 현재 방법의 정확도와 효율성을 검증하기 위해 Basic Finner에 대한 계산결과를 실험치와 비교하였다. 또한, Model Finner에서 받음각, 마하수, 회전율에 따른 동안정 미계수들의 변화를 고찰하였다. 해석 결과 천음속 영역에서 핀 사이에 발생한 충격파가미사일의 피치안정성을 증진시킴을 알 수 있었다. 계산의 결과는 비정상 Euler 해석이 충분한 정확도로 동안정 계수의 예측에 적용될 수 있음을 보여준다.

Three dimentional unsteady Euler equations are solved and an integration method is presented to predict the dynamic stability derivatives of transonic missiles. Results for the Basic Finner model are compared with several experimental data to vaildate the prediction capability of the present method. The variations of dynamic stability derivatives are discussed with respect to angle of attack, Mach number, and rotation rate. Results show that shock waves between fins enhance the pitch-damping characteristics in transonic region. Results also imply that the Euler equations can give the damping coefficients with comparable accuracy.

키워드

참고문헌

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피인용 문헌

  1. Numerical Simulation of Square Cylinder Near a Wall with the ε -SST Turbulence Model vol.31, pp.8, 2003, https://doi.org/10.5139/JKSAS.2003.31.8.001
  2. Computation of Dynamic Damping Coefficients for Projectiles using Steady Motions vol.31, pp.8, 2003, https://doi.org/10.5139/JKSAS.2003.31.8.019