Cannon Gun Tube Erosion Wear And Life Studies

The erosion and wear of barrel surface is an important factor in restricting the life of artillery and deciding artillery combat capability. The research on erosion-wear of barrel is necessary. The paper uses a100mm anti-tank artillery as the research object, combined with the interior ballistics theory, heat transfer theory and multidisciplinary theory, carries out a detailed analysis and study to the problems of barrel’s erosion-wear and lifespan during launch. The main contents are as follows:(1) The velocity, temperature, density, pressure of gunpowder gases and other parameters which include the convective heat transfer coefficient, during the gun firing process are obtained accurately by using the classical interior ballistic theory and programming;(2) The explicit finite difference method is adopted to establish the barrel transient heat transfer model during gun firing. By numerical analysis of the one-dimensional radial temperature field of the barrel solid wall, the temperature distribution of gun barrel in both single shots and bursts shots are obtained, respectively.(3) According to the peak temperature of the inner wall of the gun barrel obtained by the numerical calculation, the thermochemical empirical formula and the barrel ablation model based on the melting layer are used to calculate the gun barrel’s ablation during the single shots and bursts shots.(4) The gun barrel’s ablation interior ballistic model is established, the inherent laws between the lifespan of the gun barrel and the amount of the gun barrel’s radial ablation are derived. Further the barrel’s life theoretical calculation model is established and the barrel’s lifespan during the single shots and bursts shots are predicted respectively.