Abstract

This paper touches upon the effect of a polyvinyl butyral content (0–2.3%) on the combustion of a Ti + C granular mixture with different types of titanium. Experiments are carried out with no external gas flow, so conductive combustion is expected to be observed due to a low decomposition temperature and a small amount of polyvinyl butyral. However, convective combustion is manifested in rapidly burning mixtures because the granule surface is ignited with hot gaseous decomposition products of polyvinyl butyral. It is explained how undecomposed polyvinyl butyral falls behind the ignition front, and it is revealed that the type of combustion of the Ti + C granular mixture depends on its burning rate in the case where no gas flows through the sample. Based on the experimental and theoretical analysis of the combustion process, it is established that granules are ignited during convective combustion at a temperature of the \(\alpha \to \beta\) transition in titanium. The different effect of a polyvinyl butyral content on slowly and rapidly burning Ti + C mixtures is qualitatively explained.

中文翻译：

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具有不同气化添加剂含量的 Ti + C 颗粒混合物的各种燃烧类型

摘要

本文涉及聚乙烯醇缩丁醛含量（0-2.3%）对不同类型钛的 Ti + C 颗粒混合物燃烧的影响。实验是在没有外部气流的情况下进行的，因此由于分解温度低和少量聚乙烯醇缩丁醛，预计可以观察到传导燃烧。然而，对流燃烧表现在快速燃烧的混合物中，因为颗粒表面被聚乙烯醇缩丁醛的热气态分解产物点燃。解释了未分解的聚乙烯醇缩丁醛如何落在点火前沿，揭示了在没有气体流过样品的情况下，Ti+C颗粒混合物的燃烧类型取决于其燃烧速度。基于燃烧过程的实验和理论分析， \(\alpha \to \beta\)在钛中的过渡。定性地解释了聚乙烯醇缩丁醛含量对缓慢和快速燃烧的 Ti + C 混合物的不同影响。