전산 기법을 이용한 공대공 유도 미사일의 고앙각 공력특성 예측

Efficient prediction of aerodynamic characteristics remains important in the preliminary design stage of missile. In particular unexpected side force and yawing moment can occur by asymmetric vortex in air-to-air missiles with slender shaped body at high angle of attack. In this study, a CFD code based on the Navier-Stokes equations was used to calculate the flowfields at high angle of attack, while a semi-empirical method was used at low angle of attack. It was shown that side force and yawing moment at high angle of attack can be predicted with reasonable accuracy by a CFD method based on the concept of applying different surface roughness in forebody.