【摘要】 为进一步提高HTPB推进剂的能量水平,从理论和实验两个方面研究了固体组分含量对HTPB推进剂的能量性能、燃烧性能和力学性能的影响。结果表明,随固体含量的增加,推进剂理论比冲增加,当固体含量为90%(高氯酸铵37%、黑索今36.6%、铝粉17.4%)时,其理论比冲可达270.62s;高氯酸铵43%、黑索今30%、铝粉17%时,燃速压力指数约为0.34,-40℃时的最大延伸率为48%。当固体含量为88%(高氯酸铵48%、黑索今23%、铝粉17%)时,调节HTPB推进剂配方填料粒度及级配,燃速可从7.0MPa下的7.0mm·s-1提高至10.9mm·s-1,燃速压力指数相当(约为0.4),20℃时的最大延伸率可达74%。更多还原

【Abstract】 To improve the performance of the propellant,energy properties,mechanical properties and combustion properties of HTPB propellants were studied. The results show that the theoretical specific impulse is enhanced with the increasing of solid contents,and reaches 270.62 s when the solid contents are 90% (including AP 37%,RDX 36.6%,Al 17.4%). The pressure exponent of 90% solid contents HTPB propellant (including AP 43%,RDX 30%,Al 17%) is about 0.34 and ε_m reaches 50% at -40 ℃. By modifying the different contents and particle size distributions of AP or RDX,the burning rate of 88% solid contents HTPB propellant (including AP 48%,RDX 23%,Al 17%) is enhanced from 7.0 mm·s -1 to 10.9 mm·s -1 ,and the pressure exponent is about 0.4 , and ε_m reaches 74% at 20 ℃ .更多还原