Browse > Article

A NUMERICAL STUDY ON THE CHARACTERISTICS OF ASYMMETRIC VORTICES AND SIDE FORCES ON SLENDER BODIES AT HIGH ANGLES OF ATTACK  

Jung S.K. (경상대학교 대학원 항공공학과)
Jung J.H. (경상대학교 대학원 항공공학과)
Myong R.S. (경상대학교 기계항공공학부 및 항공기부품기술연구소)
Cho T.H. (경상대학교 기계항공공학부 및 항공기부품기술연구소)
Publication Information
Journal of computational fluids engineering / v.11, no.3, 2006 , pp. 22-27 More about this Journal
Abstract
Flow around a guided missile in high maneuver, i.e. at a high angle of attack, shows complex phenomena. It is well known that even in geometrically symmetric conditions the flow around a missile at high angles of attack can generate unexpected large side forces and yaw moments due to asymmetric vortices. In this paper, a CFD code (FLUENT) based on the Navier-Stokes equations was used for the numerical analysis to find a suitable numerical mechanism for generation of asymmetric vortices. It is shown that a numerical technique of applying different surface roughness to a specific area of the missile nose surface gives the best fit in comparison with the experimental results. In addition, a numerical investigation of variations of side forces and pressure distributions with angle of attack and roll angle was conducted for the purpose of identifying the source of vortex asymmetries.
Keywords
High Angle of Attack Aerodynamics; Asymmetric Vortices; Side Force Coefficient; Surface Roughness; Convective Instability;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Dunne, A.L., Black, S., Schmidt, G.S., and Lewis, T.L., 1990, "VLA Missile Development and High Angle of Attack Behavior," NTIS N90-17553
2 Luo, S.C. et al., 1998, "Flowfield Around Ogive/Elliptic-Tip Cylinder at High Angle of Attack," AIAA Journal, Vol.36, No.10, p.1778-1787   DOI
3 Wilcox, D.C., 2002, "Turbulence Modeling for CFD," 2nd ed., DCW Industries
4 Lamont, P.J., 1982, "Pressure Around an Inclined Ogive Cylinder with Laminar, Transitional, or Turbulent Separation," AlAA Journal, Vol.20, No.11, p.1492-1499
5 Champigny, P., 1994, "High Angle of Attack Aerodynamics," AGARD Report 804 (Special Course on Missile Aerodynamics)
6 황수정, 1996, "큰 받음각을 가진 세장형 물체 주위의 유동현상 예측에 관한 수치기법 연구," 박사학위 논문, 서울대 대학원
7 Zilliac, G.G., Degani, D., and Tobak, M., 1991, "Asymmetric Vortices on a Slender Body of Revolution," AlAA Journal, Vol.29, No.5, p.667-675
8 FLUENT 6.1 User's Guide, 2003, FLUENT Inc
9 Lesage, F., Nicolle, J., and Boulianne, M.A., 2000, "Navier-Stokes Computations of High Angle of Attack Missile Flowfields," AlAA Paper 2000-4212
10 Degani, D., 1991, "Effect of Geometrical Disturbance on Vortex Asymmetry," AIAA Journal, Vol.29, No.4, p.560-566   DOI
11 Yuan, C.C. and Howard, R. M., 1991, "Effects of Forebody Strakes on Asymmetric Vortices for a Vertically-Launched Missile," AIAA Paper 91-2864-CP