过氯酸铵粒度对丁羟复合固体推进剂侵蚀燃烧的影响

EFFECTS ON EROSIVE BURNING OF AP PARTICLE SIZE IN HTPB COMPOSITE SOLID PROPELLANTS

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

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

摘要:

用透明窗发动机及高速摄影装置研究过氯酸铵粒度对丁羟复合固体推进剂侵蚀燃烧的影响,得出了不同过氯酸铵粒度推进剂的侵蚀比与气流速度及压力的关系式.结果表明,复合推进剂中过氯酸铵粒度越大,其燃速对气流速度和压力越敏感,即侵蚀越严重;过氯酸铵粒度越大,其侵蚀界限速度越小,即其越易发生侵蚀;每种过氯酸铵粒度的推进剂,其侵蚀界限速度均随压力的增大而减小.

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.