PRELIMINARY DESIGN FOR ISL'S GUIDED SUPERSONIC PROJECTILE

摘要

ISL's project GSP (Guided Supersonic Projectile) is focused on the guidance and control capabilities of air defense ammunitions. This paper presents the preliminary designs of the projectile related to the following fields: aerodynamics, interior ballistics and onboard electronics. The aerodynamic optimization of the projectile was obtained by a CFD parametric approach to investigate the geometry effects on the aerodynamic coefficients. Critical aspects of this study were the fin geometry (lead and trail edge bevel) and the asymmetries created by the open cavities after impulsion. Results were obtained for a Mach number of 3.0 for various angles of attack. A sabot of 40mm caliber was also investigated to ensure the structural integrity during the phase of the in-bore acceleration. To be able to transmit the trajectory data and correction commands from the projectile to a ground station, a special antenna integrated in the tip of the nose projectile and a mechanical transmitter were developed.