PLUMES ABOVE LINE FIRES IN A CROSS-WIND

被引:32
作者
MERCER, GN
WEBER, RO
机构
[1] Mathematics Department, University College, UNSW, Australian Defence Force Academy, Canberra, ACT
基金
澳大利亚研究理事会;
关键词
D O I
10.1071/WF9940201
中图分类号
S7 [林业];
学科分类号
0829 ; 0907 ;
摘要
A model for the plume above a line fire in a cross wind is constructed. This problem is shown to reduce to numerically solving a system of 6 coupled ordinary differential equations for given initial conditions that depend upon the fire characteristics. The model is valid above the flaming zone and takes inputs such as the width, velocity and temperature of the plume at a given height above the flaming zone, Different horizontal ambient wind velocities are allowed for and a comparison is made between some of these representative wind profiles. The plume trajectory, width, velocity and temperature are calculated for these different representative velocity profiles. This model has application to the calculation of temperature-time exposures of vegetation above line fires and hence can be used in models that predict effects such as leaf scorch and canopy stored seed death. On a larger scale it has application to the problem of tracking burning brands which can cause spotting ahead of the fire.
引用
收藏
页码:201 / 207
页数:7
相关论文
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