Application of FOX-7 in NEPE Propellant

摘要

The characteristics of NEPE propellant with FOX-7 were calculated and determined by means of energetic calculation, combustion, mechanical and sensitivity determinations.It was found that the oxygen parameter (Φ) and density (p) kept constant (0.56 and 1.80g·em-3), the combustion temperature (Tc)decreased from 3700K to 3592K, the mean molecular weight of combustion gas (Me) slightly increased from 27.28 g·mol-1 to 27.48 g·mol-1 and the theoretical specific impulse (Isp) decreased from 2615N·s·kg1 to 2560N·s·kg-1 by applying increasing FOX-7, which is used to substitute, equivalent HMX, from 0％ to34％ in the formulation of NEPE propellant.It was also shown that the burning rote increased and the pressure exponents increased from 0.44 to 0.48, the maximum stress of the propellant at +20°C and +50°C increased from 0.84MPaand 0.68MPa to 1.06MPa and 0.75MPa, respectively, while the elongation of the propellant decreased from 64.1-86.1％ to 32.5-45.3％, meanwhile the friction sensitivity of the propellant decreased from 100％ to 88％ and the impact sensitivity(H50) increased from 27.5cm to 38.0cm.