Aerodynamic Characteristics Analysis Of Rigid Umbrella Resistance Device For One-dimensional Trajectory Correction Projectile

The trajectory correction projectile is a new kind of ammunition for adapting to therequirement of improving accuracy and cost in modern war.Its realization is that thetrajectory correction projectile mechanism is arranged on the original basis and throughcalibration of projectile flight trajectory to improve the hit rate.This article based on the one-dimensional trajectory correction projectile umbrellaresistance device as the core,Using Fluent computational fluid dynamics software FLUENTanalyze the ordinary standard artillery shell and shell of installed umbrella-shaped resistancein detail and concluded that the drag coefficient, lift coefficient and pitch momentcoefficient variation law. At the same time, this paper make some simple design of theumbrella correction mechanism. Based on the theory of exterior ballistics, according to thecharacteristics of one-dimensional trajectory correction, the trajectory model wasestablished,the simulation analysis to the abilities of resistance umbrella with differentunfolded angle was carried on,and the law between the unfolded angle of resistanceumbrella,correction time and correction distance of the projectile is obtained by thesimulation analtsis.This study can provide a theoretical basis for the design of umbrellaresistance device for one-dimensional trajectory correction projectile.