巷道火灾火焰长度影响因素正交实验

Orthogonal experiment on influence factors of flame length in roadway

为了得出火焰长度与火源热释放率、火源直径、可燃物扩散率之间的关系,在单因素实验的基础上,采用正交实验的方法研究了火焰长度主要影响因素与影响规律。结果表明:火灾过程中,火焰长度受火源热释放率、火源直径、风速以及局部阻力系数影响,并且火源热释放率的影响最大,火源直径的影响次之,风速和局部阻力系数的影响很小。该成果对巷道火灾的预防和控制具有指导意义。

Theoretical study indicates that flame length is correlated to heat release rate,fire source diameter,combustible matter diffusivity,etc.An experiment is conducted and recorded using a video camera.On the basis of single factor experiment,the main influence factors and influence characteristics of flame length are investigated using orthogonal experiment.The experimental results show that flame length is affected by heat release rate,fire source diameter,air flow velocity and local resistance coefficient.Heat release rate is ranked as most influential factor,fire source diameter is less influential,and air flow velocity and local resistance coefficient are even less.