Study on Combustion Wave Structure of Hydrogen Storage Alloy/AP/HTPB Propellant

The flame structures,combustion surface temperature,quenched surface appearances,quenched surface relict elements and quenched surface relict compounds of Al/AP/HTPB propellant(P-A0),Al/hydrogen storage alloy/AP/HTPB propellant(P-A10) and hydrogen storage alloy/AP/HTPB propellant(P-A17) were researched by using single frame photography,W-Re micro-thermal couple,scanning electron microscope(SEM),energy dispersive spectrum(EDS) and X-ray diffraction(XRD) methods.The results show that the combustion surface of P-A10 and P-A17 exhibits a stronger injection phenomena compared to P-A0;their surface temperatures are increased by 5.92 ℃ and 7.45 ℃,respectively,and their condensed phase reaction areas are increased by 13.13% and 47.30% separately in the presence of hydrogen storage alloy;The quenched surface of P-A17 is neat relatively,and the swell surface of alloy group is mostly oxidized;The amount of carbon left behind on quenched surfaces of P-A10 and P-A17 is lowed by 15.81% and 27.61% separately,which proves that combustion efficiency of AP/HTPB propellant organic components on the burning surface could be promoted by hydrogen storage alloy;The amount of Al on quenched surface changes from high to low and when the amount of Al2O3 on quenched surface changes from low to high by the order of P-A0,P-A10 and P-A17,which proves that combustion efficiency of hydrogen storage alloy is higher than Al.Combustion properties of AP/HTPB propellant could be improved when using hydrogen storage alloy as combustion agent in place of Al.