巷道火灾过程中燃烧速率和释热速率的预测  

Prediction of Burning Rate and Released Heat Rate During Tunnel Fire

作　　者：傅培舫[1] 周怀春[1] 

机构地区：[1]华中科技大学煤燃烧国家重点实验室,武汉430074

出　　处：《燃烧科学与技术》2006年第5期408-412,共5页Journal of Combustion Science and Technology

基　　金：国家自然科学基金(50576025).

摘　　要：根据燃料的元素构成、热化学反应式、反应物和生成物的焓变以及燃烧过程中监测到的烟气中氧气浓度随时间变化规律,提出了计算某一时刻燃料燃烧速率、释热速率和介质吸热率的关系式；通过实际规模的火灾试验,对其数据的计算表明,对木质类巷道火灾,最大比燃烧速率为0．193,最大释热速率约为1～3．5 MW,介质的吸热率为22%．According to the composition of elements of fuel, thermochemical forms, combustion heat, and time-dependent relations of oxygen concentration acquired during fullscale tunnel fire experiment, the formulae are given for calculating dimensionless burning rate（ DBR）, released heat rate, and ratio of medium decalescence. It is shown that the maximum DBR is 0. 193, the maximum value of released heat rate is from 1 to 3.5 MW and the ratio of adsorbed heat of smoke-flow to total released heat is 22% for timber burning during fullscale tunnel fire experiment.

关 键 词：巷道火灾试验 热化学式 比燃烧速率 释热速率 介质吸热率 

分 类 号：TD752[矿业工程—矿井通风与安全] TU973.34[建筑科学—结构工程]