Rate of Burning of Wood (A Simple Thermal Model)
作者:
A. MURTY KANURY,
期刊:
Combustion Science and Technology
(Taylor Available online 1972)
卷期:
Volume 5,
issue 1
页码: 135-146
ISSN:0010-2202
年代: 1972
DOI:10.1080/00102207208952514
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
In the design of reliable fire hazard ratings and effective fire detection/protection systems, a clear understanding of the interaction between the fire and fuel is greatly desirable. While the fuel supplies combustible vapors to the flames, the flames feed heat back to the fuel for more vapors to be generated. Assuming that (a) the temperature profiles in the interior of a wood-like solid heated externally are linear, (b) the solid pyrolyzes abruptly at a critical temperature, (c) the pyrolysis products are removed out of the solid instantaneously upon their release and (d) the thermal properties of char and wood depend only on the solid density but not on temperature, a simple energy balance is made to deduce the influence of surface heat flux, specimen thickness, pyrolysis endothermicity, internal convection and thermal properties (of the virgin solid and char) on the rate of mass loss of an infinite slab and a cylinder in a fire. The predictions are in good agreement with the available experimental data. Precise measurement of the surface heat flux condition and inclusion of the resistance to the vapor flow in the char is expected to bring the predictions even closer to the measurements.
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