RDX-CMDB推进剂燃烧性能的调节

THE ADJUSTMENT OF COMBUSTION PROPERTIES FOR PROPELLANT RDX-CMDB

关键词:  硝胺推进剂  改性双基推进剂  推进剂燃烧性能  燃烧控制

Key words:  Ammonium nitrate propellant  Modified double base propellant  Combution property of propellant  Combustion control

摘要:

调节燃速和降低压力指数是RDX-CMDB推进剂性能改善的技术关键之一.用同一种有机铅、铜盐催化剂对实测比冲为2000～2200N·s/kg的四种双基及RDX-CMDB推进剂进行试验研究表明:铅-铜-炭黑三种燃烧催化剂组合使用也可在RDX-CMDB无烟推进剂中获得良好的平台或麦沙效应.这里炭黑的加入起了关键作用,可用燃烧催化的铅-碳理论作进一步的解释.所述的铅、铜催化剂与四种碳黑搭配,可使所研究的四种推进剂燃速在14～29mm/s范围内调节.

Abstract:

Burning rate adjusting and pressure exponent reducing both are the key techniques to improve combustion properties of smokeless propeilant RDX-CMDB. Four DB system propeilant including RDX with specific impulses of 2000 to 2200N-s/kg added same Pb-Cu-CB catalyst are tested in a 50mm diameter rocket motor. The experement results indicate that with this combustion catalyst plateau or mesa combustion property can be obtained in the middle and highter pressure range, and the plateau burning rate can be adjusted within 14 to 29 mm/s for DB and RDX-CMDB propellants. Meanwhile, the width of plateau pressure range is over 8.0 MPa.