多层丝网结构抑制管内气体爆炸的试验

EXPERIMENT TO SUPPRESS GAS EXPLOSION IN PIPE WITH STRUCTURE OF MULTI-LAYER WIRE MESH

建立了管内可燃气体燃烧爆炸和爆炸抑制的试验研究系统,该系统测试响应时间小于0.001秒,测量精度为0.5%。化学计量浓度的乙炔/空气充满整个管道,管道一端封闭一端开敞,在封闭端中心点火,研究了不同丝网层数和丝网目数对火焰传播速度和火焰淬熄的影响。研究结果表明,被丝网淬熄的临界火焰速度与丝网层数呈线性关系;将丝网层数、目数和丝网直径的乘积定义为丝网几何参数,根据试验结果得出了丝网几何参数与能够被丝网淬熄的临界火焰速度之间的关系。

The experimental system is set up for combustion explosion and explosion suppression of in-pipe combustible gas. The testing response time of the system is less than 0.001s. The accuracy of measurement is 0.5%. The whole pipeline is filled by the premixed gas of acetylene/air with stoichiometric concentration. One end of the pipeline is closed and another is open. The igniting sparker is installed in the center of the closed end. The effect of the different layer number of wire mesh and the different mesh size on the flame propagating speed and quenching is studied. The study results show the relationship between the critical speed of flame quenched by the wire mesh and the layer number of the wire mesh is linear. The product of the layer number and the mesh size and the diameter of the wire mesh is defined as the geometrical parameter of the wire mesh. According to the experimental results, the relationship between the geometrical parameter and the critical speed of flame that can be quenched by the wire mesh is achieved.