摘要
为了研究挥发分对煤尘爆炸的影响,利用FCY-II粉尘云最低点火能测定仪和水平玻璃管煤尘爆炸试验系统,测定了不同挥发分含量的煤尘爆炸最小点火温度和爆炸产生的最大火焰长度,分析了挥发分对煤尘爆炸最低点火温度影响,即通常情况下挥发分含量越大,最低点火温度越高,个别煤样不符合此规律,是因为水分含量过高,对煤尘爆炸起到抑制作用.选用合适的湍流及燃烧的数学理论模型,应用CFD软件模拟不同挥发分含量下煤尘爆炸的最大火焰长度,模拟结果与试验数据比对,误差均<20%,说明数值模拟结果可靠,模拟手段可行,为划分爆炸等级和制定防爆措施提供参考依据.
In order to study the influence of volatile matter on coal dust explosion, Using FCY II minimum ignition energy meter of dust cloud and horizontal glass tube coal dust explosion test system, Measured the minimum ignition temperature and maximum flame length of coal dust explosion with different volatile content. Analyzed the effect of volatiles on the minimum ignition temperature of coal dust explosion. Usually, the greater the volatile content is, the higher the minimum ignition temperature is. A coal samples do not conform to this rule,because the moisture content is too high, which plays an inhibitory role in the coal dust explosion. Simulated maximum flame length of coal dust explosion under different volatile content by CFD, The simulation results are in good agreement with the experimental data,and the error is < 15%, which indicates that the numerical simulation results are reliable, and the simulation method is feasible, which provides a reference for dividing the explosion grade and developing explosion prevention measures.
作者
宋佰超
李雨成
罗红波
SONG Bai-chao;LI Yu-cheng;LUO Hong-bo(College of Safety Science and Engineering,Liaoning Technical University,Fuxin 123000,China;Key Laboratory of Mine Pressure,Hulunbuirr 021008,China;Key Laboratory of Mine Thermo Motive Disaster and Prevention,Ministry of Education,Fuxin 123000 China)
出处
《数学的实践与认识》
北大核心
2019年第1期118-123,共6页
Mathematics in Practice and Theory
基金
国家自然科学基金(51774168)
辽宁省教育厅项目(LJYL002)
内蒙古教育厅项目(NJZY14306)
关键词
挥发分
最小点火温度
最大火焰长度
数值模拟
Volatile matter
minimum ignition temperature
maximum flame length
numerical simulation
