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通过X光电子能谱和扫描电镜对推进剂和过氯酸铵-粘合剂的多层夹心件之熄火样品的观察,研究了在复合推进剂的燃烧中,压强和添加剂CaCO_3对过氯酸铵被熔化粘合剂覆盖的面积分数(γ)和过氯酸铵的凝相反应分数(G)的影响。在作者已提出的“两区模型”的基础上,发展了一个新的“统一模型”(UM)。该“统一模型”是一个进一步考虑了熔化粘合剂的覆盖,在覆盖下存在反向气化和受燃速调节剂(例如CaCO_3)控制的凝相反应的理论模型。为了计及过氯酸铵颗粒尺寸的分布,像PEM模型一样,统计的方法也被引入了本模型。本模型不仅能用来分析初温、过氯酸铵颗粒尺寸及其分布对燃烧特性的影响,而且可以用来解释平台、麦撤和常规的燃烧特性。同时,本模型还能够成为研究包括负压力指数在内之固体复合推进剂的侵蚀燃烧与燃烧不稳定性研究的基础。
By X-ray photoelectron spectroscopy and scanning electron microscopy of propellants and ammonium perchlorate - binder multilayer sandwich parts of the flame-retardant samples were observed in the combustion of composite propellants, the pressure and additives CaCO_3 of ammonium perchlorate The area fraction (γ) covered by the molten binder, and the coagulation reaction fraction (G) of ammonium perchlorate. On the basis of the “two-zone model” that the author has proposed, a new “unified model” (UM) has been developed. The “uniform model” is a theoretical model that further takes into account the coverage of the melted binder, under the cover, the condensation reaction under the control of reverse gasification and combustion-retarding agent (eg CaCO 3). To account for the distribution of ammonium perchlorate particle size, statistical methods, like the PEM model, have also been introduced into this model. This model can be used not only to analyze the effect of initial temperature, ammonium perchlorate particle size and its distribution on combustion characteristics, but also to interpret the platform, the wheat withdrawal, and the general combustion characteristics. At the same time, this model can also be the basis for the study of erosion combustion and combustion instability of solid propellants including negative pressure index.