NM/RDX/Nano-Al膏体推进剂特性研究

Study on NM/RDX/Nano-Al Pasty Propellant Property

关键词:  凝胶  膏体推进剂  配方  推进剂性能

Key words:  Gel  Pasty propellant  Formulation  Propellant property

摘要:

为进一步研发新型特种推进剂品种，向推进技术应用领域发展和延伸，开展了NM(硝基甲烷)/RDX/Nano-Al膏体推进剂配方研究，并对其能量、流变以及燃烧性能进行了分析。结果表明:采用最小自由能法估算膏体推进剂配方比冲为2674.2 N·s/kg；膏体推进剂流变行为遵循Herschel-Bulkley本构方程，在0～30℃范围内，假塑性指数n小于1，属于非牛顿假塑性流体，同时膏体推进剂具有明显的触变性以及蠕变-回复特性，在角频率为1Hz且低应力下(≤50Pa)，膏体推进剂储能模量(G′)大于损耗模量(G′′)，此时具有较稳定的三维网络结构；与含纳米铝热剂Nano-Al/PbO双基系推进剂相比，膏体推进剂在10~15MPa压强范围内燃速较快，但在低压下未燃。

Abstract:

In order to further develop new special propellant and promote the development and extension of the ulsion technology，the NM/RDX/Nano-Al pasty propellant was studied and the energy performance，rheological behavior and combustion property were analyzed. Results show that the specific impulse is 2674.2 N·s/kg by the estimation of the minimum free energy method. The rheological behavior follows the Herschel-Bulkley law，and the non-Newtonian pseudopalstic index n is less than 1 at 0～30 ℃ and the pasty propellant is a typical pseudopalstic fluid. Also，the pasty propellant has obvious thixotropy and creep-recovery characteristics. The storage modulus(G') is greater than the loss modulus(G') at the angular frequency of 1Hz under low stress(not more than 50Pa)，and now pasty propellant has a three-dimensional network structure. Compared with the double-base propellant containing nano thermite Nano-Al/PbO，the burning rate of pasty propellant is greater at 10~15MPa，but it does not burn at low pressure.