Physical Modeling of Surface Fire Under Nonparallel Wind and Slope Conditions
Physical Modeling of Surface Fire Under Nonparallel Wind and Slope Conditions
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非平行风和坡度条件下地表火灾的物理模拟
DOI：
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发表时间：
2010
期刊：
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通讯作者：
F. Chatelon
中科院分区：
文献类型：
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作者：
J. Balbi;Jean;Thierry Marcelli;F. Chatelon
我们在之前的工作中开发的物理模型（J. H. Balbi et al., 2007）用比实时更快的计算时间预测火灾行为。然而，它的不便之处是引入了经验法则（B. J. McCaffrey, 1979），该法则根据热释放率提供火焰高度。作者介绍了该模型的两个改进：三角火焰假设和考虑后火锋面空气冷却的修正。为了验证他们简化模型的这个变体，将其与重要的实验结果进行了比较（D. X. Viegas, 2004b）。在高风速和高坡度条件下，用死松针叶制成均匀和平面燃料床进行试验。尽管这些数值很高，但这个物理模型提供了一个很好的火线边缘近似值。
The physical model we developed in a previous work (J. H. Balbi et al., 2007) predicts fire behavior with a computational time that is faster than real time. However, it has the inconvenient of introducing an empirical law (B. J. McCaffrey, 1979), which provides flame height according to heat release rate. The authors introduce two improvements of this model: the triangular flame hypothesis and a modification taking into account the air cooling on the rear fire front. To test this variant of their simplified model, it was compared with important experimental results (D. X. Viegas, 2004b). The experiments were performed in homogeneous and plane fuel beds made with dead Pinus pinaster needles under high values of wind and slope. In spite of these high values this physical model provides a good approximation of the fire front perimeter.