铅盐对无烟NEPE推进剂燃烧性能的影响

Effects of Types of Lead Compounds on the Combustion Characteristics of Smokeless NEPE Propellants

通过测定不同压力下推进剂的燃烧性能以及熄火表面元素分析,研究了3种铅盐(LF、LP和LC)对无烟NEPE推进剂燃烧性能的影响。结果表明,LF、LP或LC使该推进剂的压强指数在3～5MPa压力范围内降至0.33～0.48,5～12MPa降至0.18～0.58。推进剂熄火表面元素分析结果表明,LF和LP中的铅元素在推进剂燃烧过程中更易于在燃面富集,而LC中铅元素在燃面上的富集程度相对较弱,这与3种铅盐对无烟NEPE推进剂的燃速催化效果一致。

The effects of three kinds of lead compounds on the combustion characteristics of smokeless NEPE propellant were investigated by Crawford bomb test and elemental analyses of quenched surface of propellant samples. The used lead compounds were LF (an energetic lead compound), LP (an organic lead compound) and LC(an inorganic lead compound), respectively. The propellant samples, containing LF, LP and LC, were prepared by slurry casting process. It was found that those lead compounds all could decrease the pressure exponents of the propellant to 0.33～0.48 in the pressure range of 3～5MPa and to 0.18～0.58 in the pressure range of 5～12MPa, respectively. LP, which also had no side effect on the curing process of the propellant, can obviously improve the combustion characteristics of smokeless NEPE propellant in the pressure range of 3～12MPa. The results of elemental analyses indicated that the content of lead on the combustion surface of propellant containing LF or LP is more enriched than that of the propellant containing LC.