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Abstract

Two commonly used solid combustible materials in China, PMMA(Polymethyl Methacrylate) and Red Pine of Northeast China, are selected as typical noncharring and charring material respectively. Bench-scale experiments were carried out to measure the heat release rates of these two materials under various external radiant heat fluxes. A comparison of similarity and difference was made between the Heat Release Rate (HRR) of PMMA and that of Red Pine and the influence of external radiant fluxes on HRR was analyzed. Bubble layers and char layers formed near the heated surface of burned noncharring and charring materials, respectively, make them differ greatly in pyrolysis and combustion processes as indicated by different HRR profiles, which are closely related to the material's original structural properties and greatly influenced by external radiant heat flux.

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A Comparative Experimental Study on Heat Release Rates of Charring and Noncharring Solid Combustible Materials

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