Abstract: Based on the model of one-dimensional steady-state reaction gas flow,the impact of fine-grained AP on burning rate of the modified double base(CMDB) propellant was discussed.The technology particle size was introducted.The impact factors of ammonium perchlorate(AP) on burning surface structure and decomposition of CMDB propellant were revised.The combustion rate prediction model of CMDB propellant applied to ammonium perchlorate was established.The model can be applied to calculate quantitatively the burning rate if chemical structure of solid propellant is given.The calculation results showed that theoretical predictions agree well with experimental results at 9.8～19.6MPa conditions.Most of the errors were less than 5%,and the reliability of the model was tested,which showed it can well guide the development for propellant formula.

Key words: Solid propellant;CMDB;Combustion rate prediction;Model;Ammonium perchlorate;Particle size

摘要： 在一维气相稳态反应流模型的基础上,讨论了细粒度AP对改性双基(CMDB)推进剂燃速的影响,引入工艺粒度d*s,修正了AP对燃烧表面结构影响因子fAP和分解影响因子gAP,建立了适用于细粒度AP的CMDB推进剂燃速预示模型,该模型可从推进剂化学结构参数出发,定量计算AP-Al-CMDB推进剂的燃速。结果表明:在压强9.8～19.6MPa条件下,不同AP粒度和含量下的燃速计算结果和实验结果吻合较好,大部分误差在5.0%,检验了模型的可靠性,对推进剂配方研制具有较好的指导意义。

关键词: 固体推进剂;复合改性双基推进剂;燃速预示;模型;高氯酸铵;粒度