Assessment of the influence of A1H_3 on chemical composition and thermodynamic parameters of combustionproducts of solid propellants

摘要

Chemical composition and thermodynamic parameters of combustion products of composite propellants containing aluminium hydride AlH3 are investigated. Propellants based on ammonium chlorate(Ⅶ) (NH_4ClO_4) modified by standard HTPB binder are considered. As the energetic ingredients Al and AIH_3 are considered. The analysis is intended to examine the differences that arise by replacing of Al by its hydrate. Chemical composition and thermodynamic parameters of combustion products are evaluated by MWEQ computer program supplied with large species database. By same weight content, replacement of Al by AlH3 results in lowering of the temperature of combustion products. Enhancement of energetic outcome (Qv) as well as rise of amount of gaseous products, per unit volume of the propellant, is observed.