硝酸酯增塑聚醚高能推进剂高压燃烧性能研究

Study on combustion properties of nitrate ester plasticized polyether propellants at high pressure

关键词:  高能推进剂  高压  燃烧性能

Key words:  High energy propellant  High pressure  Combustion performance

摘要:

实验研究了硝酸酯增塑聚醚高能推进剂高压燃烧性能。通过对PET,PEG和叠氮聚醚三种粘合剂;NG,TEGDN及BTTN三种增塑剂;AP,RDX,Al粉的含量和粒度进行研究,发现推进剂在9～25MPa压强范围内燃速 压强曲线存在拐点,得出了推进剂各主要组成及固体组分的含量和粒度变化时推进剂高压燃烧性能的变化规律:分别以PET,PEG和叠氮聚醚为粘合剂时,推进剂燃速依次升高;含不同增塑剂的推进剂的燃速随增塑剂中硝酸酯基含量的增加而增加;AP含量增加同时RDX含量减小,燃速增大并且压强指数降低;AP粒度减小时,燃速增大,并且超细AP可大幅度增加燃速;Al粒度减小时,燃速先减小后增大,致使推进剂压强指数升高。

Abstract:

Law of the high pressure combustion properties of the nitrate ester plasticized polyether propellants was studied in this paper.Effects of different binders(PET, PEG and GAP) , plasticizers(NG,TEGDN and BTTN), the contents and the particle sizes of solid ingredients (AP,RDX and Al)on combustion properties at high pressure were studied experimentally.It was found that there was the break point of r-p curve in the nitrate ester plasticized polyether propellants from 9MPa to 25MPa,and the variation law of the high pressure combustion properties was obtained when composition and solid ingredients contents or particle sizes of propellants were changed.The combustion rate of propellant is increased in turn as binders are PET, PEG and GAP respectively; The more nitrate ester group,the higher the combustion rate of propellant with different plasticizers; when AP contents are increased and RDX contents are reduced,the combustion rate is increased and the pressure exponent is reduced; When the particle sizes of AP are reduced, the combustion rate is increased and super fine AP can increase it distinctly; When the particle sizes of Al are reduced , the combustion rate is reduced firstly and then increased.This results in the pressure exponent to increse.