Influence of Angle of Attack on Initial Ejection Trajectory of Missile

doi:10.3969/j.issn.1000-1093.2021.02.021

Abstract

Abstract: For the instability of separation process of missile, the influence of angle of attack on the initial ejection trajectory of air-to-air missile is analyzed by solving fluid dynamics equations and 6DOF equations of rigid body. Referring to American AEDC's captive trajectory system (CTS) testing, in which uses a generic wing/pylon/finned store model, a similar geometric model is established and numerical calculation is carried out. The feasibility of the numerical calculation method is verified by comparing the numerical results and the CTS results in Ref.［29］. The method is used to calculate and analyze the initial trajectory of an air-to-air missile launched from a fourth-generation fighter under different angles of attack. The following laws are revealed by the analysis: under supersonic condition, 6DOF motion of missile is apparently influenced by the angle of attack at the initial ejection stage. With the increase in the angle of attack, the pitch motion of missile becomes more intense, the roll angle becomes larger, and the yaw angle becomes smaller. The velocity of missile-separation from aiacraft decreases obviously, and the safety of missile-separation from aiacraft decreases gradually.

Key words: missile, missileseparationfromaiacraft, embeddedbombbay, dynamicmesh, ejectiontrajectory, angleofattack

CLC Number:

TJ760.11

ZHANG Bing, HOU Ming, WANG Dianyu, DONG Youliang. Influence of Angle of Attack on Initial Ejection Trajectory of Missile[J]. Acta Armamentarii, 2021, 42(2): 438-448.

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