Numerical Study of Heat-transfer Characteristics of Rapid-fire Gun Barrel System

Thermal ablation wear is a key factor in deciding the life of a rapid-fire-gun barrel. By employing a certain kind of rapid-fire-gun barrel adopting outside liquid cooling method to act as the research object,the fluid-structure coupling heat-transfer model of barrel,cooling fluid and water-jacket was established,and then such a model was calculated with finite element method. The study shows that the firing rate of a rapid-fire gun is an important factor in deciding the peak temperature of bore. The outer surface temperature of barrel can be efficiently cooled down by adopting the outside cooling fluid method in a rapid-fire gun,but its effect on reducing barrel inner peak temperature and prolonging the life is limited. The best match between cooling efficiency and power can be obtained by choosing a reasonable flow velocity.