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从矿井火区实际出发,选用类似于煤矿开采现场产生的多元可燃性气体:CH_4,C_2H_6,C_2H_4,CO,H_2,利用瞬态光谱测量系统探究了爆炸引发阶段中间产物的光谱特征,分析了组分配比、组分浓度和甲烷浓度对压力特性和中间产物光谱的影响。研究结果表明:在多组分气体加入量较小(未形成体系贫氧状态)时,3种自由基发射光谱峰值出现时间随着甲烷浓度的增大先缩短后延长;在多组分气体加入量较大(形成体系贫氧状态)时,自由基发射光谱峰值出现时间随着甲烷浓度的增大不断延长;当其以任意比例混合后,微观反应过程中关键自由基的出现顺序为:OH自由基先于O自由基,O自由基先于H自由基出现。
Based on the practical fire area of coal mine, the multi-element combustible gases such as CH_4, C_2H_6, C_2H_4, CO and H_2, which are similar to those generated in the coal mining field, were selected to investigate the spectral characteristics of the intermediate products in the initiation phase of explosions with transient spectroscopy. Distribution ratio, component concentration and methane concentration on the pressure characteristics and the intermediate product spectrum. The results show that when the amount of multi-component gas is small (the oxygen-deficient state of the system is not formed), the peak appearance time of three kinds of free radicals emission first shortens and then increases with the increase of methane concentration; when the multi-component gas is added The amount of free radical emission peaks increased with the increase of methane concentration. When they were mixed in any proportion, the order of the key free radicals in the microscopic reaction was as follows: OH Free radicals precede O radicals and O radicals occur before H radicals.