本文实验研究了乙醇、煤油及其混合物的热解特性.利用气相色谱测量了其中氢气、甲烷、乙烯和一氧化碳的浓度.实验结果表明,燃料的热解率随温度的增加而增加.热解形成的气体中,乙醇热解得到的氢气浓度高于煤油,而甲烷和乙烯的浓度低于煤油.掺混乙醇后的煤油混合燃料热解时形成的氢气浓度随乙醇含量的增加而增加,对于在超燃冲压发动机中采用在煤油中添加一定量的含氧燃料(如乙醇、甲醇等)来解决着火和稳定燃烧问题具有很好的潜在优势.
Pyrolysis characteristics of ethanol,kerosene and their mixture are studied experimentally in this paper.The concentrations of H_2,CH_4,C_2H_4 and CO in the pyrolysis products are measured using one gas chromatography.The results indicate that the pyrolysis ratio of the fuels increases with increasing temperature.In the pyrolysis products,the concentration of H_2 from ethanol is higher than that from kerosene,yet the concentrations of CH_4 and C_2H_4 from ethanol are lower than those from kerosene.Additionally,the concentration of H_2 from ethanol-kerosene increases with increasing ethanol mass fraction.Finally,it is concluded that it will be a potential solution for the ignition and stable combustion challenge in scramjets to add a certain amount of oxygenated ruel in kerosene.
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