复合推进剂铝粉燃烧反应动力学计算研究

Numericalcalculation on Aluminumcombustion Kineticsin Solid Composite Propellant

对固体火箭发动机推进剂的比冲、燃烧效率等性能来说,现代社会已经提出了更高的要求。开展含铝推进剂燃烧机理研究,建立含铝推进剂燃烧模型具有重大现实意义,基于Al/O_(2)、Al/CO_(2)、Al/H_(2)O和Al/AP/HTPB/RDX推进剂的反应机理的详细反应机理,重点研究了密闭环境下反应过程中参与反应的物质组分变化,初步得到了Al/AP/HTPB/RDX推进剂燃烧模型,发现环境压力的提高有助于反应的进行,能提高反应进行的速率,并能提高反应达到平衡时的环境温度;发现环境初始温度的升高显著缩短了反应的延迟时间,但不利于放热总包反应的进行。

The modern society has put forward higher requirements for the specific impulse and combustion efficiency of solid rocket motor propellant.It is of great practical significance to study the combustion mechanism of aluminum-containing propellants and establish the combustion model of aluminum-containing propellants.Based on the detailed reaction mechanism of Al/O_(2),Al/CO_(2),Al/H_(2)O and Al/AP/HTPB/RDX propellants,the changes of substance components involved in the reaction process under closed environment are studied.The combustion model of Al/AP/HTPB/RDX propellant is preliminarily obtained.It is found that the increase of ambient pressure is helpful to the reaction,the rate of reaction and the ambient temperature when the reaction reaches equilibrium.It is found that the increase of the initial ambient temperature significantly shorten the delay time of the reaction,but is not conducive to the exothermal total package reaction.