Aerodynamics of projectiles with wrapped around and grid fins

Abstract

Different kinds of control surfaces are being used on supersonic projectiles. Grid fins (GF) and Wrapped around fins (WAF) are two important control surfaces that have been used on many projectiles. Both have different aerodynamics characteristics associated with them. Viscous computational fluid dynamic simulations were used to compute the flow field around projectiles having GF and WAF mounted at the end of a 10 diameter long body having ogive nose. The computed aerodynamics coefficients are in good agreement with the available experimental data. The performed simulations help in understanding the flow physics associated with these surfaces. The variation of center of pressure with Mach has been shown to get a comparison of both configurations.