周期性辐射热源对聚合物点火的影响

Guanyu Zheng, A. Benard, I. Wichman
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引用次数: 0

摘要

在给定频率范围内,用数值方法研究了周期辐射源对热塑性聚合物点火过程的影响。当固体聚合物在对流环境中受到高辐射热流通量时,就会发生点火过程。随着着火的发展,固体聚合物经历了预热、熔化和热解。由于冷凝相热解过程,可燃气体通过燃烧反应与气相中的氧气发生反应。利用二维多相燃烧模型预测了周期辐射对着火的影响。根据外部辐射源的瞬态模式,研究了点火延迟和燃烧特性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Influence of a Periodic Radiation Heat Source on Polymer Ignition
The ignition process of a thermoplastic polymer is investigated numerically regarding to the influence of a periodic radiation source for a given range of frequency. The ignition process is initiated when a solid polymer receives a high radiation heat flux in convective flow environment. The solid polymer undergoes preheating, melting, and pyrolysis with the development of ignition. The combustible gases, as a result of condensed phase pyrolysis process, react with oxygen in the gas phase via combustion reaction. A two-dimensional multi-phase combustion model is utilized to predict the influence of periodic radiation on ignition. The ignition delay and combustion characteristics are examined with respect to the transient patterns of the external radiation sources.
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