Effect of airflow direction and velocity on smoldering waves in combustible porous layers

被引：3

作者：

Bakhman, NN ^{[1
]}

Kuznetsov, GP ^{[1
]}

Puchkov, VM ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Chem Phys, Moscow 117977, Russia

来源：

COMBUSTION EXPLOSION AND SHOCK WAVES | 2002年 / 38卷 / 05期

关键词：

smoldering; wave processes; porosity;

D O I：

10.1023/A:1020378232064

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The mechanisms of propagation of smoldering waves in porous layers of pine sawdust were studied experimentally for cocurrent and opposed airflows in closed (with one open butt-end) and semiclosed (with a flat free surface) systems. We investigated the shape of the smoldering front and the effects of the airflow direction and velocity, combustible-layer porosity, and the dispersity of the sawdust layer on the smoldering wave velocity. Maximum temperature in the smoldering wave is established. In a closed system with airflow velocity higher than 5-7 cm/sec, the smoldering rate is an order of magnitude higher in a cocurrent flow than in an opposed flow. For cocurrent flow, the velocity of a smoldering wave is two orders of magnitude higher in a closed system than in a semiclosed system. The experimental dependences are explained.

引用

页码：518 / 524

页数：7