| 胡靖,陆守香,黎昌海,陈兵.船舶封闭舱室火灾烟气温度特性研究[J].火灾科学,2010,19(3):109-115. |
| 船舶封闭舱室火灾烟气温度特性研究 |
| A Study on temperature characteristic in enclosed cabin fire |
| 投稿时间：2010-03-30 修订日期：2010-05-08 |
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| DOI：10.3969/j.issn.1004-5309.年.期.顺序 |
| 基金项目:国家自然科学基金（50976109）；中国科学院研究生科技创新与社会实践资助 |
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| 中文关键词: 封闭舱室 双区模型 烟气温度 波尔兹曼分布 |
| 英文关键词:Enclosed cabin Two-zone model Temperature of gas Boltzmann distribution |
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| 中文摘要: |
| 摘要: 封闭舱室火灾与开放空间火灾有很大的不同，通过在内尺寸为1m*1m*0.75m的舱室内的一系列不同油盘直径庚烷油池火试验，我们发现了烟气的循环卷吸现象，舱内气体可以分为上部的密烟气层和下部的稀烟气层两层，此时传统的双区域模型对火灾的模拟不再适用。烟气温度的空间分布可以用一个分段函数来表示，密烟气层内部温度基本一致，温度与高度无关；稀烟气层内部温度随高度具有均匀的梯度，为高度的一次函数。同时，研究发现熄火时刻舱内的烟气温度分布符合波尔兹曼分布律，且与油盘直径无关几，即与火源功率无关，满足统一的波尔兹曼方程，并就本实验参数条件下的温度数据给出了拟合曲线方程。 |
| 英文摘要: |
| Abstract:Fires in enclosed compartments are very different from those at in open space. A series of heptanes pool fire experiments under different diameters of oil pans were performed in a cabin of 1m*1m*0.75m. We found a phenomenon called smoke recycled entrainment. The gas in the cabin can be classified into two layers: one is upper thick smoke layer; the other is lower thin smoke layer. For this situation the traditional two-zone model is not suitable. The special distribution of smoke temperature can be defined by separable function. The inner temperature in the thick smoke layer is all the same and the temperature has nothing to do with the height; the inner temperature in the thin smoke layer has even gradient with the increase of height, a linear function of height. Meanwhile, it is found that the smoke temperature profile, when extinguished, is suitable for the rule of Boltzmann distribution and has nothing to do with the diameters of the oil pans, in the other word has nothing to do with the power of the fire. It satisfies united Boltzmann equation. Fitting curve equation was put forward according to temperature data in this experiment. |
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