摘要
利用绝热边界条件模拟了无限大平板的导热,提出了基于多点测温的自热反应动力学分析方法(多点法).该方法认为在一维导热下,在系统内某一点的导热方向发生变化的临界时刻,通过该点的导热项为零,此时可以采用类似CPT方法求解得出动力学参数.导热方向发生临界变化的时刻可以通过计算等间距的多点温度的相关系数来确定.与CPT方法和HR方法仅关注中心点温度不同,多点法关注多个测温点的数据,一次实验可以得出多组数据.通过堆积烟草样品的实验将新方法与以上两种方法进行了对比分析,结果证明了新方法的优越性和可靠性.
Infinite plane slab was simulated by creating adiabatic boundary through physical insulation in this paper, and a new method for measuring self-ignition kinetics based on multipoint temperature under one-dimensional conduction （multipoint temperature method）was proposed. According to the method, under one-dimensional conduction, the thermal conduction of one elementary volume can be neglected when its direction of heat conduction is going through the critical change, which can be determined by the linear dependence coefficient of equidistant multipoint temperature. And then the value of activation energy can be calculated in the same way as the CPT （crossing point temperature） method. Different from the CPT and HR （heat release） methods which focus on the central point, the new method concerns multiple points, which can provide more data from one experiment. A comparison of the three methods is made in the experiments on tobacco, which proves the advantage and reliability of the new method.
出处
《燃烧科学与技术》
EI
CAS
CSCD
北大核心
2012年第6期481-485,共5页
Journal of Combustion Science and Technology
基金
国家自然科学基金资助项目(51120165001
51076148)
国家"十二五"科技支撑计划资助项目(2011BAK07B01-02)
关键词
热自燃
活化能
一维导热
导热方向
线性相关系数
self-ignition
activation energy
one-dimensional conduction
direction of conduction
linear dependence coefficient
