| 基于绝热火焰温度多元混合气体可燃性极限的理论预测 |
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| 引用本文： | 夏阳光,陶刚,张礼敬.基于绝热火焰温度多元混合气体可燃性极限的理论预测[J].中国安全生产科学技术,2016,12(9):30-35. |
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| 作者姓名： | 夏阳光 陶刚 张礼敬 |
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| 作者单位： | （南京工业大学 安全科学与工程学院，江苏 南京 210009） |
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| 摘 要： | 为了预测多元混合气体可燃性极限，通过化学平衡计算软件分析确定了气体在可燃性下限（LFL）和可燃性上限（UFL）的燃烧产物及计算绝热火焰温度（CAFT），基于能量平衡方程和简化反应模型，分别建立了混合气体LFL和UFL预测模型。应用该预测模型对CH4、C2H4、C3H8、C3H6和CO组成的不同比例混合气体可燃性极限进行预测。结果表明:简化反应模型对于LFL和UFL预测值与文献中实验值的平均相对误差分别为2.76%和5.45%，相关系数分别为0.995和0.950；同时发现两步简化模型对含有C2H4和CO混合组分预测结果误差较大，但对于平均碳原子数大于2的混合气体，预测结果一致性较好。
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| 关 键 词： | 混合气体 计算绝热火焰温度 能量平衡 可燃性上限 可燃性下限 预测模型 |
Theoretical prediction on flammable limit of multi-component gas mixture based on adiabatic flame temperature |
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| XIA Yangguang,TAO Gang,ZHANG Lijing.Theoretical prediction on flammable limit of multi-component gas mixture based on adiabatic flame temperature[J].Journal of Safety Science and Technology,2016,12(9):30-35. |
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| Authors: | XIA Yangguang TAO Gang ZHANG Lijing |
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| Affiliation: | (College of Safety Science and Engineering, Nanjing Tech University, Nanjing Jiangsu 210009, China) |
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| Abstract: | In order to predict the flammable limit of multi-component gas mixture, the combustion products and the calculated adiabatic flame temperature (CAFT) of gas mixture at the lower flammable limit (LFL) and upper flammable limit (UFL) were obtained by using a chemical equilibrium calculation software. The prediction models on LFL and UFL of gas mixture were established respectively based on the energy balance equation and simplified reaction model. The flammable limit of gas mixture composed by CH4、C2H4、C3H8、C3H6 and CO with different proportions were predicted by using the prediction models. The results showed that the average relative errors were 2.76% and 5.45% respectively between the prediction values by the simplified reaction model and the experimental values in former literature of LFL and UFL, with the correlation coefficient of 0.995 and 0.950. Furthermore, the error of prediction results using two-step simplified model was larger for gas mixture composed by C2H4 and CO, but the consistency of prediction results was better for gas mixture with the average number of carbon atom larger than 2. |
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| Keywords: | gas mixture calculated adiabatic flame temperature energy balance upper flammable limit lower flammable limit prediction models |
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