Evaluation Of Forest Fuel Combustion In Nanchang

This paper evaluates 15 kinds of combustibles’Camellia oleiferaAbel, Cinnamomum camphora, Cedrus deodara, Liriodendron chinensis, Phyllostachys heterocycla, Cinnamomum burmanni, Osmanthus fragrans, Ginkgo biloba, Imperata cylindrica, Thysanolaena maxima,Zingiber officinale, Miscanthus floridulus, Cicuta virosa, Pteridium aquilinum var.latiusculum, Digitaria sanguinalis combustibility based on the thermal analysis and cone calorimeter data extraction,and draw the following conclusions through the principal component analysis based on 19 parameters of thermal analysis.Special trees and herbaceous fuel heating weightlessness curve has experienced three majorstages:one is the loss of phase, the two stage is thermal decomposition of holocellulose, three is the lignin pyrolysis stage.The pyrolysis of cellulose and lignin pyrolysis stage are the two main stages of thermal weight loss. The trend of the release rate of arbor and herbs of combustibles heat change along with the increase of time graph divides into three stages, The first stage of the heat release rate increases slowly, is the process to remove the water, the second phase of the heat release rate curve growth rapidly, has obvious peak,is flame combustion process, the third phase of the heat release rate curve is steady, has little change.In 8 kinds of arbor forest combustibles, the average heat release rate and total heat release of Ginkgo biloba are very small,and fire resistance capacity is relatively strong. The minimum is only 3S of Liriodendron chinense’TTI, the FPI is also very low, is very easy to be ignited relatived to other tree forest fuel. The bamboo and Camellia oleifera ignition temperature and F P I is very high, are ignited and the fire resistance is strong relatived to other tree forest fuel. The average heat release rate and total heat release of fern with ginger are relatively high, combustibility is high, Imperatacy lindrica and Digitaria Sanguinalis ignition temperature and higher IFP, the fire resistance is strong,and is difficult to ignite.The flammability, fierce and persistent of eight kinds of arbor forest fuel can be divided into three categories:the first category is the camphor tree and oil tea Camellia, are more flammable, but the relative of combustion is intensity, has short duration, the cellulose decomposition of the two kinds of fuel is in the minimum amount. The second category is the rest of the six kinds of fuel, they are not easy to ignite, but relatively intense and sustained combustion. The flammability, fierce and persistent of seven kinds of herbs in the forest can be divided into three categories:The first category is tigergrass, it’s easy to ignite,burns fiercely, but has short duration. The second category includes crabgrass, Jiang Yujue, they are not easy to ignite, burn fiercely or has longer duration. The third category includes hemlock, Miscanthus floridulus and Imperata cylindrica.The light, intense and sustain ed are less in the middle, lower combustion.According to the principal component analysis method, the combustion of 15 kinds of forest fuel can ranking for: Pteridium aquilinum var.latiusculum>Cinnamomum burmanni > Osmanthus fragrans> Liriodendron chinensis > Cinnamomum camphora > Zingiber officinale>Cedrus deodara>Phyllostachys heterocycla>Miscanthus floridulus>Imperata cylindrica> Ginkgo biloba> Digitaria sanguinalis> Camellia oleiferaAbel> Thysanolaena maxima> Cicuta virosa...