Energetic level evaluation of NEPE solid propellant containing hexanitrohexaazaisowurtzitane (CL-20)

Energetic level of NEPE solid propellant containing different ratio of CL-20 and HMX was analyzed with our code based on the minimum free energy method. The effect of CL-20 content changing with other ingredients in the formula on the energetic characteristics was studied. The results show that replacing HMX with CL-20 in NEPE propellant can increase the energy density and improve the oxidizing balance of the binder system. In the case of low Al content formula, the use of CL-20 provides more ample space for formula regulation, which can not only improve the propellant energetic characteristics but also alleviate the contradiction between lowering signature and elevating energetic level of the solid propellant.