带阻力环一维弹道修正弹的气动特性研究

rag brake changes the aerodynamic configuration of the projectile, it influences largely the drag coefficient and other aerodynamic coefficients. To improve the concentration of projectile, the one dimensional trajectory correctional projectile(TCP)with drag brake is researched. The steady-state computational fluid dynamic (CFD) calculations is used to simulate the projectile roll by rotating the reference frame around the x-axis at the specified spin rate, aerodynamic performance for different structures of drag brakes is studied by simulations, expecial roll damping and Magnus moment of them. The results indicated that annular drag brake could decrease roll damping significantly comparing with petal-shaped drag brake at supersonic speeds, the model with petal-shaped drag brake performed well in the Magnus moment. Research about the structure of drag brake is useful for the design of one dimensional trajectory correctional projectile.