Aerodynamic Shape Optimization of Supersonic Projectile Fins

The aim of this work is to find an efficient aerodynamic-based design algorithm for projectile fins and configuration shape optimization. Three-dimensional supersonic flow over a projectile with fins at Much number 5 and one degree angle of attack was studied. The Runge-Kutta method and multi-block technique was used to solve the governing equations. A basic configuration was assumed for the fins. The front and rear straight edges of the fins were replaced with polynomial curved edges and the aerodynamic effects were considered. Using this method, the optimized shape of these edges were achieved. At this step, the geometrical parameters of fins and projectile were changed and their effects on drag and stability moment were investigated. The CFD code was ran for several different geometries and the effect of each parameter was investigated. At the end, the design algorithm of fins was derived and configuration shape optimization of projectile’s body and fins for one example was presented.