作　　者： ; ; ; ; ;

机构地区： 西安交通大学能源与动力工程学院动力工程多相流国家重点实验室

出　　处： 《工程热物理学报》 2013年第3期558-562,共5页

摘　　要： 本文利用定容燃烧弹和激波管测量了C1-C4低碳烷烃燃料(甲烷、乙烷、丙烷和正丁烷)在不同压力和温度下的预混层流燃烧速度和着火延迟期,并利用Chemkin软件对预混层流燃烧和着火过程进行了模拟计算和化学反应动力学分析。实验结果和计算结果均表明,在相同工况下,四种烷烃的层流燃烧速度值分别为:甲烷最小,乙烷最快,丙烷和正丁烷相差不大并介于甲烷和乙烷之间;四种烷烃的着火延迟期分别为:甲烷最大,乙烷最快,丙烷和正丁烷相差不大并介于甲烷和乙烷之间。随着当量比的增加,甲烷混合气的马克斯坦长度增大,而乙烷、丙烷和正丁烷的减小。通过化学反应动力学分析和敏感性分析解释了上述现象。 Laminar burning velocities and ignition delay times of methane, ethane, propane and n-butane were determined experimentally in a constant volume bomb and a shock tube at different pressures and temperatures. The effects of flame kinetics and high temperature ignition kinetics on C1-C4 alkanes were also conducted. The experimental results showed that of these four alkanes have the same behaviors on the laminar burning velocity and ignition delay time. Methane ignites and burns the slowest, ethane the fastest, and propane and n-butane have intermediate and similar reactivity. The detailed kinetic models （USC Mech 2.0） of C1-C4 alkanes were used to simulate the experiments. The dominant elementary reactions on flame kinetics are almost the same for four alkaneair flames. The sensitive elementary reactions on ignition delay time are different for these four alkanes.

关 键 词： 低碳烷烃 层流燃烧速度 着火延迟期 化学反应动力学

领　　域： [动力工程及工程热物理]