D144 固体物質の自発着火に与えるガス相での輻射熱吸収に関する研究

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概要

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• Effects of radiative energy absorption via decomposed gaseous products on spontaneous gas-phase ignition over a combustible solid heated by external radiation are studied numerically. Numerical model includes time-dependent heat and mass transport and chemical reactions of gas- (exothermic) and solid-phase (endothermic) in three-dimensional domain. PMMA is considered as solid combustibles since rich physical/chemical data is available. Ignition characteristics are examined in different absorption coefficients of MMA vapor and in various orientations of the solid combustibles. It is shown that the ignition delay time gives complex responses in various orientations of the sample (sometimes delays, but sometimes enhances the ignition), while is rarely affected qualitatively by the absorption coefficients, 0.1∿0.2 (atm)^<-1>(cm)^<-1>, considered in the present study. Since the dynamic motion of the 'energy-absorbed-HOT-gases' plays an important role in the prior process of the ignition, precise 3-D transport processes must be considered for an understanding of the absorption effects.

• 2002-11-06

著者

• KASHIWAGI Takashi

  National Institute of Standards and Technology, Gaithersburg

• Kashiwagi Takashi

  National Institute Of Standards And Technology

• 中村 祐二

  名大工

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• D144 固体物質の自発着火に与えるガス相での輻射熱吸収に関する研究
• 301 微小重力場における紙の燃え広がりに与える容器の影響 : 解析における境界条件の重要性(O.S.微小重力環境における諸現象)
• Combustion Research Studies at the National Institute of Standards and Technology

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