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该研究建立了一个火焰和火焰环境的模型 ,在此基础上利用PHEONICS软件模拟了 3个火灾的实例 .模拟的结果与实验研究总体说来比较符合 .模拟揭示了 :(1)火线前方的风速场可以划分为3个区域 .在火焰前方与地面交接处总是有一个漩涡存在 ;(2 )如果火线火强度已知 ,3个区域的形状和尺度主要由坡度和环境风速决定 ;(3)在火头前方存在逆风区 .当坡度为 0时 ,环境风速对于逆风区的风速的大小影响不大 .但是在下坡时 ,逆风明显增强
The study established a model of flame and flame environment, on the basis of which PHEONICS software was used to simulate three fire examples. The simulation results are in general agreement with the experimental studies. The simulation reveals: (1) the wind speed in front of the fire line The field can be divided into three zones. There is always a whirlpool at the junction of the front of the flame and the ground. (2) The shapes and dimensions of the three zones are mainly determined by the slope and the ambient wind speed if the fire line fire intensity is known. (3) In front of fire head, there is a headwind zone.When the slope is 0, the wind speed has little effect on the wind speed in the headwind zone, but the headwind is obviously increased