The study of projectile aerodynamics plays a crucial role in the development and optimization of ammunition, particularly in enhancing range and accuracy. In this context, the present work aims to investigate the effects of varying the Boat Tail length of a 155 mm artillery projectile on its aerodynamic drag coefficient. The methodology involved computational fluid dynamics (CFD) simulations in which several geometrical configurations of the projectile’s Boat Tail were analyzed. These simulations allowed for a detailed evaluation of the pressure and velocity fields around the projectile's surface, leading to the determination of aerodynamic coefficients for each configuration. The numerical results were compared to reference data obtained from the Projectile Design and Analysis System (PRODAS), serving as a benchmark to validate the computational findings. The analysis revealed which Boat Tail lengths are most effective in reducing aerodynamic drag. It was observed that specific geometric proportions result in a noticeable decrease in the drag coefficient, thus confirming the efficiency of the Boat Tail design technique in aerodynamic optimization. Moreover, the study underscores the relevance of rear-end geometry in the overall aerodynamic performance of artillery projectiles. The results provide valuable technical insights for the design and improvement of future ammunition, contributing to the broader field of external ballistics. The findings also highlight the importance of computational modeling as a powerful tool for evaluating structural modifications and guiding design decisions aimed at reducing aerodynamic resistance and improving projectile efficiency.
