To obtain the factors which affect the interior ballistic performance of desensitized high-energy nitramine gun propel-lants,the interior ballistic model was built through the closed vessel test and the 14.5 mm ballistic test.The correction coeffi-cients were fitted by the particle swarm optimization algorithm.Then,the effects of muzzle velocity V0 and maximum chamber pressure pm on burning progressive factor Pr and charge mass ω were analyzed through the theoretical model calculation.It was found that,the correction coefficient of burning rate χ and the utilization coefficient of propellant force η should be considered to predict the dynamic combustion characteristics of high-energy nitramine gun propellants by the classical interior ballistic theo-ry.Compared with the case of static combustion,the relative increase of burning rate could exceed 10%in the dynamic combus-tion.Meanwhile,because of the energy dissipation,only about 80%of the propellant force can be effectively converted into the kinetic energy of projectile in the theoretical calculation.In result,the interior ballistic performance of gun propellants is affected by the coupling of Pr,ω,χ and η.As the major mechanism,the interior ballistic performance is significantly affected by the stat-ic combustion characteristics and the charge mass.There is a linear positive correlation between V0 and ω,while pm can be ex-pressed by an exponential function of ω,and the coefficients in different correlations are determined by Pr.Nevertheless,with the different process conditions,the fluctuations of χ and η lead to the varying of interior ballistic performance,which increases the prediction deviation of the fitting correlation.
desensitized high-energy nitramine gun propellantinterior ballistic performancecorrection coefficient of burning rateutilization coefficient of propellant forcefitting correlation
维普
万方数据
