不同加热面毛竹材燃烧性能研究

锥形量热仪(简称CONE)是当前用以表征材料燃烧性能的主要试验仪器,能同时获得材料燃烧时有关释热、点燃时间、释烟、毒性、质量变化参数等多种重要的动态信息,其实验的结果与大型燃烧实验结果之间存在良好的相关性,已成为评价材料燃烧性能的主要手段.

Study on Burning Behaviour of Phy llostachys pubescensw ith D ifferentHeated Surface

Burning behav iour o fP hyllostachys pubescens aged 6 years w ith d ifferent heated surface w ere tested bycone ca lorim eterw ith the heat irradiance 50 kW ? m^-2. The results show ed that the ign it ion time o f bamboo w oodw as in order of outer cu lm > inner culm> m idd le culm w hen the tangen tial section was used as a heated surface.M eanwh ile, w ith the rad ia l section o r cross section w as used as a heated surface, the ignition tim e of bamboo w oodw as in order o f outer culm> m idd le culm > inner culm. When the tangential section, the radia l section and cross sect ion o fm idd le culm w ere used as heated surface, the longest ignit ion tim ew as produced by the cross sect ion. The total heat re lease o f 600 s of bamboow ood w as in order o f ou ter cu lm> inner cu lm> m iddle cu lm. The pkHRR o f outer culm and inner culm w as at first peak, the t ime of the 2^nd pkHRR of bamboo wood w as delayed from inner culmto outer culm. W hen the cross section used as the heat surface, thew idth of the 2^nd pkHRR increased. The carbon ization time became shorter. There w ere tw o stronger process of smoke, onew as before the ign iting and ano therw asafter the charring finished. The w eakest smoke appears in the charr ing and flameless combustion stage. The massloss and the heat re lease ind icated the same chang ing curves.