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火旋风是林火蔓延过程中的特殊火行为现象,与树冠火和飞火关系密切.火旋风的发生机理在于旋转涡的生成和发展.构建室内火旋风模拟发生装置是当前火旋风研究的常用方法.在室内模拟试验中,红外热像和热电偶可用于测量火焰温度,高速摄影、三维激光多普勒和皮托管用于测量火旋风的转速.基于室内实验数据,可构建模拟火旋风发生发展的三维模型.
The fire whirlwind is a special fire behavior in the process of forest fire spread, which is closely related to crown fire and fly fire.The mechanism of fire whirlwind is the formation and development of revolving vortex.It is commonly used in the research on fire whirlwind to construct indoor fire cyclone simulation device In the indoor simulation experiment, infrared thermography and thermocouple can be used to measure the flame temperature, high-speed photography, three-dimensional laser Doppler and pitot tube for measuring the fire whirlwind speed.Based on laboratory experimental data, we can simulate the occurrence of fire whirlwind Development of the three-dimensional model.