期刊
FIRE SAFETY JOURNAL
卷 36, 期 4, 页码 391-415出版社
ELSEVIER SCI LTD
DOI: 10.1016/S0379-7112(00)00055-2
关键词
ignition; wood; properties; integral model; cone calorimeter
This paper experimentally and theoretically examines the ignition of 50mm thick samples of wood in the Cone Calorimeter. Four species of wood were exposed to a range of incident heat fluxes up to 75 kW/m(2) with their grain oriented either parallel or perpendicular to the incident heat fluxes. The rime to ignition measurements obtained from the Cone Calorimeter were used to derive characteristic properties of the materials. These properties were used as input to a one-dimensional integral model that describes the transient pyrolysis of a semi-infinite charring solid subject to a constant radiant heat flux. The integral model predictions and experimental data compare well at incident heat fluxes above around 20 kW/m(2). At lower heat fluxes it was found that the ignition mechanism of wood is different from that at higher incident fluxes, This difference is believed to be due to char oxidation that precedes flaming ignition. The lowest radiant hear flux to cause ignition within 11/2h was Found to be approximately 10 kW/m(2) depending on species, grain orientation or moisture content. (C) 2001 Elsevier Science Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据