Effect of Metal Powder on Combustion Performance of Boron-based Propellant and Oxidation Efficiency of Boron
In order to enhance the burning rate and pressure exponent and to optimize the formulations of boron- based fuel-rich propellants, the effects of metal powder on the oxidation efficiency of boron in combustion in gas generator are researched by experiments. The boron trioxide (B2O3) content and total boron (B) content in propellant burning residues are measured by chemical analysis. The residues were obtained from the burning rate testing experiment of three propellant formulations produced in different batches. The experimental results indicate that: the first, the burning rate and pressure exponent of propellants are greatly influenced by magnesium content in formulations. When the metal content is fixed 6％(Wt.％), changed the proportions of magnesium and aluminium, magnesium content is 0％, 3％, 6％ respectively, correspondingly aluminium content is 6％, 3％, 0％ respectively. When magnesium content is higher, aluminium content is lower, the burning rate of propellant is higher and also enhances rapidly with the ressures increasing. As a result, the pressure exponent is higher. The second, the B2O3 content in burning residues is greatly affected by the magnesium content in formulations. When the magnesium content is low, the corresponding B2O3 content in residues is high, in reverse, the B2O3 content in residues is low when the magnesium content is high; with the pressure increasing, the B2O3 content gradually decreases; when the magnesium content in formulations increases the oxidation efficiency of boron gradually decreases, and it also decreases with pressure increase. It can be concluded that burning rates and pressure exponents increase with adding magnesium in formulations; the oxidation reaction of boron in condensed phase is restrained by magnesium, and result in decrease of oxidation efficiency of boron.
boron-based fuel-rich solid propellant burning rate boron powder, metal powder oxidation efficiency
WU Wane MAO Genwang ZHAO Peng ZHANG Zeyang WANG Yan
College of Astronautics, Northwestern Poly-technical University, Xian 710075, Shaanxi, China Xian Research Institute of Hi-Tech , Xian 710025, Shaanxi, China
国际会议
西安
英文
548-551
2007-10-23（万方平台首次上网日期，不代表论文的发表时间）