掺氢对高辛烷值燃料燃烧过程的影响  

Effect of Hydrogen Addition on Combustion of High Octane Number Fuels

作　　者：纪常伟[1] 周小龙[1] 王华超[1] 汪硕峰[1] 刘晓龙[1] 黄霄楠[1] 

机构地区：[1]北京工业大学环境与能源工程学院,北京100124

出　　处：《北京工业大学学报》2014年第4期613-618,共6页Journal of Beijing University of Technology

基　　金：北京市教育委员会科技计划资助项目(KZ201210005002);北京市自然科学基金资助项目(3122006)

摘　　要：通过耦合纯H2和高辛烷值标准基础燃料(primary reference fuel,PRF)燃烧机理,在CHEMKIN的Premix子程序上建立并验证了PRF-H2混合燃料预混层流火焰燃烧模型,并在该模型上就理论当量比条件下,掺氢对高辛烷值燃烧过程的影响进行了计算研究.试验结果表明:H2能加快PRF-H2混合燃料火焰的传播,促进PRF-H2混合燃料中正庚烷和异辛烷的分解;此外,掺入H2还能增大火焰中H、O和OH自由基的摩尔分数,H自由基摩尔分数的最大值由纯PRF混合燃料火焰时的4×10-3增大到了掺氢能量分数为60%时的13×10-3.The combustion mechanisms of pure hydrogen and primary reference fuel （PRF） were coupled to build the premix laminar flame burning model for the PRF-H2 blends on the Premix code of CHEMKIN software, followed by numerically investigating the effect of hydrogen blends on the combustion process of high octane number fuel and the mole fraction variations of main species and H, 0 and OH radicals. Results show that H2 blending promotes PRF-H2 mixtures burning velocity and accelerates the dissociation of the n-heptane and iso-octane in the PRF-H2 mixtures. Besides, the mole fractions of H, O and OH radicals also increased with an example that the maximum mole fraction of H radical rises from 4 ×10^-3 to 13×10^-3 as the hydrogen energy fraction varies from 0 to 60%.

关 键 词：层流火焰速率 氢气(H2) 标准基础燃料 燃烧 自由基 

分 类 号：TK411.2[动力工程及工程热物理—动力机械及工程]