Aerodynamic Characteristics and Characterization of the Double Spin Structure of Two-Dimensional Correction High-Spin Projectile

The high-spin projectile equipped with two-dimensional trajectory correction fuze has the problems of asymmetric aerodynamic parameters and tight coupling of longitudinal and transverse correction. In order to accurately characterize the aerodynamic parameters of the high-spin projectile and clarify the aerodynamic characteristics and generation mechanism of the modified projectile, an aerodynamic calculation and analysis method of double-spin structure based on CFD (computational fluid dynamics) simulation was proposed. On the basis of constructing the simulation model of the flow field in the double rolling domain, the forces of the projectile with the two-dimensional correction fuze under different control states were compared, and the inherent aerodynamic force of the high-spin projectile and the aerodynamic force caused by the two-dimensional correction fuze were clarified. The force model of the canard under the coupling of angle of attack and rolling angle was established and deduced. The results show that for the two-dimensional correction module, the relative position relationship between the joint attack angle and the canard roll angle needs to be considered to calculate the induced resistance, and affected by the leeward wind and the flow around the rudder, the force model of the canard and the transverse and longitudinal aerodynamic forces of the projectile vary with the angle of attack, roll angle and Mach number. © 2024 Beijing Institute of Technology. All rights reserved.