Ignition conditions and characteristics for high-porosity condensed materials subjected to local conductive heating

被引：1
|
作者：
Zakharevich, A. V. [1 ]
Baranovskiy, N. V. [1 ]
机构：
[1] Natl Res Tomsk Polytech Univ, Tomsk 634050, Russia
来源：
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B | 2015年 / 9卷 / 06期
关键词：
ignition delay; high-porosity condensed material; steel particle; experimental study; limiting conditions; SIMULATION; MODEL;
D O I：
10.1134/S1990793115060196
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
An experimental study of the ignition conditions (limiting heat source temperature) and characteristics (delay time) for high-porosity condensed materials under local conductive heating is reported. The study has been carried out on dry pine needles, a typical high-porosity combustible forest material. The dependence of the ignition delay for the material on the initial temperature of the heat source-a single cylindrical particle preheated to a high temperature-has been elucidated. A hypothesis concerning the mechanism of ignition of high-porosity condensed materials under local conductive heating has been formulated: the effect of high open porosity on the intensity of heat and mass transfer in the boundary layer of the material in the induction period has been substantiated.
引用
收藏
页码：911 / 914
页数：4
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