横切棒状和包覆粒状发射药混合装药定容燃烧性能

为了研究横切棒状和包覆粒状发射药混合装药的定容燃烧性能,制备了9/19的横切棒状药和含有Ti O2的高分子阻燃太根7/19包覆粒状发射药,对不同混合配比的横切棒状药和包覆粒状发射药进行了密闭爆发器试验,测定了发射药在不同装填密度下的定容燃烧性能,研究了混合比对混合装药定容燃烧性能的影响规律,分析了横切棒状药和包覆粒状发射药共同燃烧相互作用。结果表明:装填密度对发射药混合装药定容燃烧性能产生影响,随着装填密度增加,侵蚀燃烧降低,燃烧渐增性增加。混合比例对混合装药燃烧渐增性产生影响,在装填密度为0.20 g·cm~(-3)和0.32 g·cm~(-3)条件下,横切棒状和包覆粒状发射药获得较佳燃烧渐增性的混合比例分别为4∶6和3∶7。横切棒状药和包覆粒状发射药混合装药燃烧的相互影响主要表现在燃烧前期,横切棒状药改善了包覆粒状发射药的点火;燃烧中后期,横切棒状药和包覆粒状发射药燃烧趋于独立。

Constant-volume Combustion Performance of Mixed Charge of Slotted Stick Propellants and Coated Granular Propellants

In order to study combustion performance of deterrent coated granular propellant and slotted stick propellant with constant volume,7/19 propellants and 9/19 stick propellants were prepared by coating polymeric flame TiO2.The closed-bomb tests of slotted stick propellant and deterrent coated propellant were carried out,and combustion performance of deterrent coated propellant and mixed charge with constant volume was investigated.The influence of mixed ratio of slotted stick propellant and deterrent coated propellant in different loading densities on combustion was studied.Combustion mechanism of slotted stick propellant and deterrent coated propellant was analyzed.The results show that loading density impacted the combustion of mixed charge,the higher loading density can increase burning progressivity and decrease erosive combustion.In this experiment,the suitable mixed ratio of slotted stick propellant and deterrent coated granular propellant is 4 ∶ 6 and 3 ∶ 7 when loading density is 0.20 g · cm-3 and 0.32 g · cm-3,which can lead to a good combustion progressivity.It was also found that slotted stick propellants and deterrent coated propellants interact seriously in the early stages of combustion.However,as the combustion progresses,the interaction between them gradually weakens.