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首页> 外文期刊>Combustion Science and Technology >ANALYTICAL MODEL FOR DETERMINING THERMAL RADIANCE OF FIRE PLUMES WITH IMPLICATION TO WILDLAND FIRE
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ANALYTICAL MODEL FOR DETERMINING THERMAL RADIANCE OF FIRE PLUMES WITH IMPLICATION TO WILDLAND FIRE

机译：确定与野生火有关联的火柱热辐射率的解析模型

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The present work aims at developing an analytical model for evaluating the thermal radiation of a fire plume formed by burning wildland fuels at a given burning intensity and crosswind. By resolving the equations governing gas continuity, momentum, and energy conservation for a convective (buoyancy) plume, gas velocity and temperature profile along the central line of the plume were determined, which enables a quantification of radiation intensity of flame and buoyancy plume zones. Model features are examined, and the predicted results are compared with the available experimental data. It is found that for afire with burning intensity exceeding 600 kWm ~(-1) , the radiant heat emittable from its plume is not only contributed by the luminous flame zone hut also by the buoyancy plume significantly. This indicates, for the first time, a necessity of inclusion of the contribution of the buoyancy plume in evaluating thermal impact of a fire plume on a receiver in the environment. The current work provides an important basis for convenient but reliable assessment of the fire risk of buildings raised by the occurrence of a wildland fire in adjacent areas.
机译：本工作旨在开发一种分析模型，用于评估在给定的燃烧强度和侧风条件下燃烧野地燃料形成的火羽的热辐射。通过求解控制对流（浮力）羽流的气体连续性，动量和能量守恒的方程式，可以确定沿羽流中心线的气体速度和温度分布，从而可以量化火焰和浮力羽流区域的辐射强度。检查模型特征，并将预测结果与可用的实验数据进行比较。研究发现，对于燃烧强度超过600 kWm〜（-1）的大火，从其羽流散发出的辐射热不仅由发光的火焰区小屋贡献，而且还由浮力羽流显着贡献。这首次表明，在评估火羽对环境中接收器的热影响时，有必要包括浮力羽的贡献。当前的工作为方便而可靠地评估因邻近地区发生野火引起的建筑物的火灾风险提供了重要基础。

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