煤粉群非稳态统一着火模型

现有的煤的着火模型都存在通用性差的缺点，不能同时简单明了地分析着火机理和确定着火温度．本文提出了能联系单颗粒着火与群体着火的非稳态模型，以分析不同着火条件下煤的着火机理和着火温度．本模型的基本特点是，引人有限气体空间的假定，考察有限空间内的升温，确定着火条件和参数，井以此反映不同浓度的颗粒群的着火．通过对辐射换热的条件下的煤粉着火的计算，显示了本模型的优越性．它预测了不同条件下的着火机理、着火温度和着火时间，为工程设计提供了较为准确的着火温度数据，而这些结果正是现有着火模型所无法同时、准确获得的．

An unsteady universal ignition model of the pulverized coal group

In this paper,a new unsteady model is introduced to combine the single particle model andthe group model to analyze ignition process and temperature. A limited air space is assumedto consider the temperature rise in this space to calculate the ignition conditions and parameters. The ignition of the pulverized coal in different concentration is computed. The resultsshow that the model can predict the mechanics,the temperature and the time of the ignitionprocess. It is difficult for the old model to obtain these data.