含硼富燃料推进剂凝相反应对低压燃烧的影响

Effect of condensed-phase reaction on combustion of fuel-rich solid propellant based on boron in low pressure

关键词:  贫氧富燃料推进剂  硼化物推进剂  低压燃烧  燃烧性能

Key words:  Oxygen-poor fuel-rich propellant  Boron compound propellant  Low pressure combustion  Combustion performance

摘要:

用差示扫描量热(DSC)和热重分析法(TGA),分析、研究了含硼富燃料推进剂的热分解特性;并测量了推进剂的爆热和燃速,比较了AP包覆硼粒子对推进剂燃烧性能的影响。实验结果表明:含硼富燃料推进剂各组分含量相同时,在硼粒子表面包覆AP提高了推进剂的爆热,其中凝相放热量增加,气相放热量减少;而推进剂的低压燃速提高了。分析表明促进凝相反应有利于含硼富燃料推进剂低压燃速的提高。

Abstract:

The pyrolysis behavior of the fuel rich propellant based on boron was analysed and researched by thermalgravimetry analyse (TGA) and differential scanning calorimeter (DSC). The difference of the burning peculiarity between propellants whose boron was coated with and without AP was compared by measuring the explosive heat and burning rate of the propellants. The results showed: When the propellants’ formations are the same, coating boron with AP can increase the explosive heat. Condensed-phase releasing heat is increased and gas-phase releasing heat is decreased. The burning rate in lower pressure increase. Thus, improving the condensed-phase reaction can increase of the burning rate for fuel-rich propellant with boron in low pressure condition.