降速剂对NEPE推进剂燃烧性能的影响OA

The morphology and particle size of burning rate inhibitor(BRI)was characterized by SEM-EDS and laser particle size analyzer.The effect of BRI on the thermal decomposition behavior of AP,HMX and polyether adhesives were studied by DSC.The influence of BRI on the heat of explosion,combustion performance and combustion flame of NEPE propellant were analyzed.The results show that BRI was mainly composed of O element,P element and C element;BRI has little effect on the thermal decomposition temperature of AP,HMX and polyether binder,and it can reduce the heat of explosion,burning rate and pressure exponent of the propellant,the heat of explosion decreased from 6362.0J/g to 5948.0J/g,the burning rate at 7 MPa decreased from 7.17 mm/s to 6.81 mm/s,and the pressure exponent over the pressure range of 3-15 MPa decreased from 0.82 to 0.78.With the addition of BRI,the number of coral-like fusible units on the burning surface increased obviously,and the agglomeration of aluminum powder was intensified.