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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2015, Vol. 36 ›› Issue (9): 2828-2839.doi: 10.7527/S1000-6893.2015.0054

• Special Column of Aviation Guided Weapons • Previous Articles     Next Articles

Numerical investigation of multi-lateral jets interactions flow characteristics at high angle of attack

LI Bin1,2, WANG Xuezhan1, LIU Xianming1,2   

  1. 1. China Airborne Missile Academy, Luoyang 471009, China;
    2. Aviation Key Laboratory of Science and Technology on Airborne Guided Weapons, Luoyang 471009, China
  • Received:2015-01-16 Revised:2015-03-01 Online:2015-09-15 Published:2015-03-16
  • Supported by:

    Aeronautical Science Foundation of China (2014ZA12001)

Abstract:

The influence of the interaction flow field with multi-lateral jets on the aerodynamic characteristics of one missile at high angles of attack is investigated using computational fluid dynamics (CFD) method. The CFD method based on Reynolds-averaged Navier-Stokes (RANS) equations is first validated using a standard model with lateral jet and a missile of high fineness ratio, and the capability of solving jet interaction flow field and flow field around a missile at high angles of attack is confirmed. Numerical simulations are then performed on the interaction flow field with multi-lateral jets at high angles of attack. The results show that the angle of attack and the number of lateral jets have a relatively large influence on the aerodynamic load distribution. The differences in the axial distribution of the normal force coefficient and the flow structure between jet-on and jet-off reveal the mechanism of the jet interaction effects on the aerodynamic characteristics of the missile at different angles of attack. Preliminary analysis of the influence of the lateral jets on the pull-up maneuver is provided in the end and the results show that the lateral jets cannot speed up the pull-up process at an altitude of 10 km.

Key words: missile, high angle of attack, lateral jets, aerodynamic characteristics, computational fluid dynamics

CLC Number: