Eventos Anais de eventos
ENCIT 2022
19th Brazilian Congress of Thermal Sciences and Engineering
Numerical study of artillery ammunition range increase using base bleed technology
Submission Author:
André Luiz Tenório Rezende , RJ
Co-Authors:
Thallyo Yuri Caetano Pereira, Wallace Ramos Rosendo da Silva, André Luiz Tenório Rezende, Rubenildo Barros
Presenter: Wallace Ramos Rosendo da Silva
doi://10.26678/ABCM.ENCIT2022.CIT22-0230
Abstract
Artillery is the main combat support for maneuver forces and, with the evolution of the art of war and defense strategies, the increase in the range of these heavy weapons ammunition has become increasingly important. However, as designing, producing and distributing new weapons are costly and time-consuming processes, extended range munitions become very interesting alternatives. As such, since range enhancement is often one of the requirements of developing a munition, increasing the pressure at the base of the projectile is the most efficient method of extending its range. Base bleed technology is a propellant system that can be incorporated downstream of a munition and increases its range by injecting gases at the rear, which decreases recirculation zones behind the projectile and reduces base drag. However, while widely produced and used by several countries, the few bleed-based ammunition available in Brazil comes from importation and there is still a need for knowledge production to develop bleed-based systems for the different calibers of artillery endowment. This paper analyzes the increase in ammunition range through the use of a bleed-based propellant system. The study is carried out from the ballistic trajectory obtained through the modified mass-point trajectory model, proposed by NATO Standard STANAG 4355, and from the application of the fourth-order Runge-Kutta numerical method. First, numerical simulations were performed for inert projectile trajectories with the objective of validating the code. Afterwards, results were obtained to study the influence of the base bleed system parameters for the range increase. The computer codes developed allowed the modeling of the trajectory for firing angles of up to 75 degrees, within the context of artillery. The final results showed an average range increase of around thirty percent, which is expected from the ammunition literature.
Keywords
base bleed, Trajectory Simulations, artillery ammunition
