关键词: 侵蚀燃烧;推进剂燃速;端羟基聚丁二烯推进剂;复合推进剂;固体火箭发动机

Abstract: In this paper, the effects on erosive burning of AP particle size in HTPB composite solid propellants are studied by using a motor with a transparent plexiglass window and high speed photography. Three HTPB composite solid propellents, of which the main compositions are identical, but AP particle sizes different, are investigated experimentally. The correlation of ero.ssive rate versus flow velocity and pressure for the composite solid propellants with different AP particle sizes is established.The surfaces of grain tested for combustion interruption are analyzed with scanning electron microscope, and the mechanism that AP particle size effects the burning rate and the erosive burning rate is also discussed.

Key words: Erosive burning;Propellant burning rate;Hydroxy terminated polybutadiene propellant;Composite propellant;Solid rocket engine