含硼固体推进剂燃烧残渣中三氧化二硼和碳含量测定及燃烧机理研究

Boron Trioxide and Carbon Content Determination in Combustion Residue of Boron-Containing Solid Propellants and Their Combustion Mechanism

为了研究含硼富燃料固体推进剂燃烧机理,对3种配方的不同批次含硼富燃料固体推进剂在不同压强的燃速进行了测试,利用化学分析法对其燃烧残渣中B2O3和C含量也进行了测定。结果表明,硼粒子表面的B2O3延缓了硼粒子的进一步燃烧,因此残渣中B2O3含量较低;随着氮气压强增高,残渣中B2O3含量降低,而C含量、B2O3与C总含量升高;随着推进剂配方中镁含量增高,残渣中B2O3含量降低,C含量先升后降,B2O3和C总含量则降低。

In order to study the combustion mechanism of the boron-containing full-fuel solid propellants, the combustion rates of three-formula different batch propellants under different pressures were determined, and boron trioxide（B2O3） content and carbon（C） content in the combustion residue were also determined by chemical analysis method. The results show that, for the reason that B2O3 on boron particle surface staves off further boron combustion, B2O3 content is lower in the residues. With increasing nitrogen pressure, the B2O3 content in the residues decreases, and the C content and the total content ofB2O3 aad C increases. With increasing magnesium content in the propellant, the B2O3 content in the residue decreases, the C content first increases and then decreases, the total content of B2O3 and C decreases.