瓦斯爆炸火焰锋面参数测试技术实验研究

 为了探究煤矿瓦斯爆炸事故中瓦斯爆炸火焰锋面特征，在实验室模拟巷道的小型管道内进行瓦斯爆炸火焰传播实验。在管道内同一截面处，利用微细热电偶、离子探针、压力传感器及光电传感器同时测得了火焰锋面温度、离子电流强度、压力、光信号。对四种火焰锋面参数信号比较分析，结果表明：传播火焰阵面的火焰光信号、温度信号、离子电流信号稍快于压力信号，瓦斯浓度为10.17%的传播火焰在测点处火焰锋面最高温度值为1238.8℃，最高压力值为2.28atm，最高离子电流强度值为258nA；处理热电偶温度信号计算出的火焰锋面厚度为44.8cm和离子电流信号计算出的火焰锋面厚度为68.5cm，两者属于同一数量级。实验结论为进一步认识瓦斯爆炸火焰锋面在瓦斯爆炸事故中的作用和矿井防爆设备和预警设计提供一定的参考依据。

Experiment Research on Testing Technology of Gas Explosion Flame Parameter

In order to study the feature of gas explosion flame fronts in the coal mine gas explosion accident, experiments of gas explosion flame propagation were done in a small pipeline in laboratory simulation of tunnel. The temperature, ion current, overpressure and photoelectric signal of flame front at the same cross-section in tube were recorded by subtle thermocouple, ion probe, pressure transducer and photoelectrical transducer at the same time. The results show that the signals of photoelectric, temperature and ion current recorded run faster a little than the overpressure signal; The value of the highest temperature, the peak ion current and the maximum overpressure of flame front were1238.8℃, 2.28atm and 258nA with the same gas concentration of 10.17% .The flame thickness that figured out by temperature signal was 44.8cm and that by ion current signal was 68.5cm.And there are belong to the same order of magnitude. The experimental results are good for the further understanding of gas explosion flame in gas explosion accidents and to provide some reference for mine explosion-proof equipment and warning design.