三维LDV测量火旋风的实验研究

Experimental Study on Fire Whirlwind by the 3D LDV

应用三维激光多普勒测速计LDV（Laser Doppler Velocimeter）系统,通过观察和测量火旋风的卷吸的现象,对火旋风速度场进行了有效的测量,获取了火旋风的径向速度、切向速度和轴向速度等特件参数,深化认识火旋风的卷吸机理;用热成像和热电偶方法采集得到了火旋风的温度场的结构和形状。为下一步进行火旋风卷吸的现象的实验研究打下了良好的基础。

The 3D Laser Doppler Velocimeter (LDV) system was used to study the fire whirlwind flow field induced. The fire whirlwind characteristics parameters, induding radial velocity, tangent velocity and axial velocity, were obtained from the observation and masurement of the fire whirlwind by the infrared thermography and the themocouple. This experiment deepened the understanding of the mechanics of fire whirlwind entrainment and laid a good foundation for experiment study of fire whirlwind entrainment in the next step.