Numerical Simulation of Trajectory of Missile Separated from UAV

The low-field is disturbed when a missile is launched from aircraft,which influences initial attitude and trajectory of the launched missile.To simulate trajectory of the missile separated from aircraft,the CFD software named CFD-FASTRAN was used to compute the unsteady flow-field and the missile trajectory by using the moving chimera grid,Euler equations and six degree-of-freedom equation.The effect of launching force and angle of attack on the missile trajectory was presented,it is indicated that launching force just accelerates the movement of the missiles while the angle of attack change have a greater impact on movement parameters of the missile.The simulation results can provide guidance for the layout of missile in aircraft design.