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

LU Feng-zhu; CHEN Fei; MA Ling-fei; MA Nai-xun

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 2nd 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 2nd 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.

1. School of Engineering, Zhejiang Forestry College, Lin? an?? 311300, Zhejiang, China

2. ForestryW ork S tat ion of Jincheng T own,L in? an 311300, Zh ejiang, Ch ina

3. Research Inst itu te of Subtrop ical Forestry, CAF, Fuyang 311400, Zhejiang, Ch ina

Received Date: 2006-11-21

Abstract: 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 2nd 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 2nd 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.

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Reference (11)

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

Abstract

References

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