四川师范大学学报（自然科学版）2025，Vol.48Issue(6)：826-841,16.DOI:10.3969/j.issn.1001-8395.2025.06.011
惰性基底上余烬灼热燃烧的模型研究
Computational Study on the Glowing Combustion of a Wooden Ember Landing on a Non-reacting Substrate
摘要
Abstract
Fire spotting ignition by embers becomes a potential mechanism for the spread of wildfires and wildland urban interface(WUI)fires.Despite the increasing frequency in wildfires and WUI fires,there has been little research on the multiple physicochemi-cal processes involved in ember combustion.In this study,a two-dimensional(2-D)computational model was proposed to study the glowing combustion of a wooden ember.A global char oxidation reaction was used to represent the glowing combustion of the ember.First a parametric study was applied to identify parameters that contributed most to the glowing ember.Then,the model was compared to the experiments in terms of thermal response of a non-reacting substrate when exposed to a hot ember.A sensitivity ranking shows that the porosity,heat of reaction,and oxygen concentration are the most influential parameters on hot ember combustion that is mostly diffusion-controlled rather than kinetic-controlled.Thus,given the ember diversities in spotting fire,modelers should pay more atten-tion to the difference in the physical properties instead of kinetics between ember species.This study offers a substantial step forward in further modelling the ignition by embers.关键词
灼热燃烧/数值模型/木质余烬/飞火点燃Key words
glowing combustion/computational model/wooden ember/fire spotting ignition分类
资源环境引用本文复制引用
杨玖玲,彭小峰,黄蔚,王皓良..惰性基底上余烬灼热燃烧的模型研究[J].四川师范大学学报（自然科学版）,2025,48(6):826-841,16.基金项目
国家自然科学基金(52306158)、四川省自然科学基金(2023NSFSC0189)和四川省自然科学基金青年项目(2025ZNSFSC1200) （52306158）
