Molecular-Beam Mass-Spectrometric Study of the Flame Structure of Composite Propellants Based on Nitramines and Glycidyl Azide Polymer at a Pressure of 1 MPa

摘要

A study was performed of the chemical and thermal structure of flames of model composite propellants based on cyclic nitramines (RDX and HMX)and an active binder (glycidyl azide polymer)at a pressure of 1 MPa.Propellant burning rates were measured.The chemical structure of the flame was studied using molecular-beam mass spectrometry,which previously has not been employed at high pressures.Eleven species (H_2,H_2O,HCN,N_2,CO,CH_2O,NO,N_2O,CO_2,NO_2,and nitramine vapor)were identified,and their concentration profiles,including the composition near the burning surface were measured.Two chemical-reaction zones were observed.It was shown that flames of nitramine/glycidyl azide polymer propellants are dominated by the same reactions as in flames of pure nitramines.