宽压强范围少烟无铝推进剂燃烧性能研究

Combustion Performance of Reduced Smoke and Aluminum-Free Propellant in Wide Pressure Range

关键词:  丁羟推进剂  少烟  无铝  燃烧性能  燃烧稳定剂

Key words:  HTPB propellant  Reduced smoke  Aluminum-free  Combustion performance  Burning stabilizer

摘要:

针对固体火箭发动机对少烟无铝推进剂的需求，研究了宽压强范围（1~22MPa）少烟无铝推进剂的燃烧性能。通过添加高熔点燃烧稳定剂、压指调节剂复配等技术手段，采用静态燃速测试仪、标准试验发动机、全尺寸发动机以及静态烟箱法等，研究了推进剂燃速、压强指数、能量性能和烟雾特征信号与燃烧稳定剂（CW-1）、复合压指调节剂（YZJ-A/B）（有机钡盐（YZJ-A）和二茂铁季铵盐（YZJ-B））含量的变化规律。试验结果表明：采用高熔点的CW-1取代铝粉，当CW-1用量在1%~4%，推进剂在1~22MPa宽压强范围内可以稳定燃烧。CW-1取代铝粉后，推进剂比冲下降，烟雾特征信号降低。添加YZJ-A/B，推进剂在17~22MPa动态压强指数由0.39降低至0.275。

Abstract:

In order to meet the demand of solid rocket motor on the reduced smoke and aluminum-free propellant， combustion performance of this type of propellant within wide pressure range from 1 to 22MPa was investigated. By adding high-melting-point burning stabilizer and adopting compound pressure exponent modifier， the effects of burning stabilizer（CW-1） and composite pressure exponent modifier（YZJ-A/B） which were organic barium salt （YZJ-A） and quaternary ammonium salt-ferrocene salt （YZJ-B） on burning rate， pressure exponent， energy performances and smoke characteristic signal were studied， using static burning rate tester， standard test motor， full-size rocket motor and static smoke box tester. Results show that the propellant can burn stably at pressure of 1 to 22MPa， when a part of aluminum powder was replaced by high-melting-point burning stabilizer （CW-1） that takes 1% to 4% of whole propellant. In this condition， the propellant specific impulse and smoke characteristic signal decrease. When composite pressure exponent modifier including YZJ-A/B are added， the propellant dynamic pressure exponent at 17 to 22MPa decreases from 0.39 to 0.275.