| 地表火燃烧参数及其火头前影响区的实验研究 |
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| 引用本文： | 崔文彬,乔启宇.地表火燃烧参数及其火头前影响区的实验研究[J].北京林业大学学报,1998,20(5):22-27. |
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| 作者姓名： | 崔文彬 乔启宇 |
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| 作者单位： | 北京林业大学森林工业学院 |
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| 摘 要： | 通过两次地表火模拟实验，测量了地表火的主要燃烧参数，包括火蔓延速度、火焰高度、火墙厚度以及地表火火头前方的风速和温度，并计算得出对应的火线火强度．通过相关分析和回归分析，得出了以下结论：在火头前方空气中某点温度主要取决火强度和该点与火头的距离；离火头较近时辐射起决定性作用，在离火头距离小于２５ｍ以后，随着火头的接近，火头前方的风速有增大的趋势；对于９００ｋＷ·ｍ－１左右的中能量地表火，火头卷吸作用的范围大于６．５ｍ．定性地说，蔓延速度快，火墙厚度就增大．
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| 关 键 词： | 地表火，火强度，温度，风速，油松 |
Test of Combustion Indexes, Air Velocity and Temperature in Front of the Surface Fire |
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| Cui Wenbin Qiao Qiyu Niu Shukui,Li Huiqing.Test of Combustion Indexes, Air Velocity and Temperature in Front of the Surface Fire[J].Journal of Beijing Forestry University,1998,20(5):22-27. |
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| Authors: | Cui Wenbin Qiao Qiyu Niu Shukui Li Huiqing |
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| Institution: | Cui Wenbin Qiao Qiyu Niu Shukui * Li Huiqing |
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| Abstract: | The paper measured the main combustion indexes including the rate of fire spread, flame height, flame width and air velocity and temperature in front of fire heads from two surface fire experiments. The correspondent fireline intensity is calculated from the data. By correlation analysis and regression analysis, the following results are acquired:the temperature of air in front of fire head is mainly decided by fireline intensity and the distance between fire head and the measured point;The nearer the point and the bigger the fireline intensity is, the higher the temperature is in case the distance between fire head and measured point is less than 2.5m. When the distance is smaller, fireline intensity is the decisive factor. The air velocity in front of fire head increases with the coming near of fire head. For a surface fire with a fire intensity of 900kW·m -1 or so, the convection distance is at least 6.5 m. |
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| Keywords: | surface fire temperature air velocity Pinus tabulaeformis |
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