Predicting the Ignition Time of Combustibles Exposed to a Linear Heat Flux via an Integral Method
JI Jing-wei
HAO Yao-hua
WANG Yu-e
ZHANG Jing-yao
Abstract：An integral formula was applied to predict the ignition time of solid combustibles. A linear heat flux was considered and the prediction is made quickly and precisely. The formula was modified by a PDE numerical method. The ignition times of paulownia, toon, elm and acacia woods heated at various rates were predicted in combination with the surface temperature. The calculated results were evaluated in reference to experimental data published elsewhere. The results show that the integral model, modified by the PDE method, calculates the surface temperature of solid materials heated by a linear heat flux accurately. The error between calculated and test ignition time data was within 5% when the heat flux increased at a rate less than 0.5679 kW/(m~2·s).
Keywords：linear heat fluxignition timeintegral method
Publication Date：2009-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 613-617 )