含硼固冲发动机补燃室内凝相产物燃烧效率测试方法  

Test method of combustion efficiency for condensed products of boron-based propellant in secondary combustion chamber of solid ducted rocket

作　　者：吴秋[1] 陈林泉[1] 王云霞[1] 杨玉新[1] 

机构地区：[1]中国航天科技集团公司四院四十一所,西安710025

出　　处：《固体火箭技术》2014年第1期134-138,共5页Journal of Solid Rocket Technology

摘　　要：针对含硼贫氧推进剂固体火箭冲压发动机,提出了一种补燃室内凝相产物燃烧效率测试方法。设计了水冷探针取样装置,传热计算结果证明了该装置取样过程的可靠性。通过地面直连式试验,对补燃室凝相产物进行了采集,分2个工况,并使用现代仪器手段SEM、EDS及XRD,对产物的化学成分进行了深入分析。结果表明,凝相产物主要包含B、O和C三种元素;产物的主要成分为B2O3。此外,还含有B13C2、B2Ti、MgO2、Fe3O4和Ti2O3。工况1的B2O3的质量百分含量明显高于工况2,工况2的B13C2的质量百分含量明显高于工况1,每个工况自发动机轴线向壁面的径向变化过程中,B2O3的质量百分含量逐渐减小,B13C2的质量百分含量却逐渐增大。分析得出,硼的燃烧效率随着补燃室长度的增加而升高;而自发动机轴线向壁面的径向变化过程中,硼的燃烧效率逐渐降低。A test method of combustion efficiency for condensed combustion products of boron-based propellant in secondary combustion chamber of solid ducted rocket was presented. A water cooled sampling system was designed for the test method, the practicability of the sampling system was proved by heat transmission result. The intermediate combustion products in secondary combustion chamber were collected by direct-connected test. The chemical composition of condensed combustion products was deter mined by modem devices. The results firstly show that the products mainly consist of three elements including boron, oxygen and carbon.secondly, the condensed combustion products mainly consist of B2O3.Lastly, the combustion efficiency of boron particles in creases with increasing of the length of combustion chamber, whereas decreases with radial position from axis to inner wall of the secondary combustion chamber.

关 键 词：固冲发动机 含硼推进剂 凝相燃烧产物 化学成分 燃烧效率 

分 类 号：V448.15[航空宇航科学与技术—飞行器设计]