少烟HTPB/AP/RDX/Al推进剂比冲效率分析

Analysis on Specific Impulse Efficiencies of Reduced Smoke HTPB/AP/RDX/Al Propellants

对少烟 HTPB/ AP/ RDX/ Al推进剂能量性能进行了理论计算 ,通过 BSFФ 16 5和Ф315试验发动机试验 ,考察了试验发动机类型、工作压力对比冲效率的影响 ,而且与高铝含量 HTPB/ AP/ RDX/ Al推进剂的比冲效率进行了比较。结果表明 :铝含量对推进剂的比冲效率有显著的影响 ,低铝配方的比冲效率比高铝配方的比冲效率相对要高些 ;对于推进剂组分确定的配方 ,合适选择发动机的工作压力 ,可以不同程度地提高比冲效率 ;对于同一类型推进剂配方 ,通过计算理论比冲 ,结合比冲效率水平 ,可以对实际比冲进行有效的预估。

Theoretical calculations on energetic properties of reduced smoke HTPB/AP/RDX/Al propellants were carried out. Through the tests of BSFФ165 and Ф315 testing motors, the effects of the types and operating pressures of testing motors on specific impulse efficiencies were investigated. Furthermore, the comparison between the specific impulse efficiency of reduced smoke HTPB/AP/RDX/Al propellant and that of HTPB/AP/RDX/Al propellant with high aluminium content was performed. The results show that the content of aluminium influence the specific impulse efficiencies of propellants remarkably. The specific impulse efficiency of the formulation with low aluminium content is relatively higher than that of the formulation with high aluminium content. The suitable choice in operating pressures of motors can increase the specific impulse efficiencies to some extent after the formulations of propellants are determined. For the same sort of propellant formulation, the effective prediction on the actual specific impulse can be obtained through calculating the theoretical specific impulse considering the level of the specific impulse efficiency.