Experimental Study on Premixed Combustion of Dimethyl Ether- Hydrogen-Air Mixtures
Experimental Study on Premixed Combustion of Dimethyl Ether- Hydrogen-Air Mixtures
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DOI：
10.1021/ef700629j
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发表时间：
2008-02
期刊：
影响因子：
5.3
通讯作者：
Zuo-hua Huang;Gen Chen;Chaoyang Chen;H. Miao;Xibin Wang;D. Jiang
中科院分区：
文献类型：
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作者：
Zuo-hua Huang;Gen Chen;Chaoyang Chen;H. Miao;Xibin Wang;D. Jiang
利用定容燃烧弹研究了DME-氢气-空气预混混合气在不同当量比、氢气与DME+氢气比例和初始压力下的层流燃烧特性。分析了当量比、氢气添加量和初始压力对火焰速度和燃烧特性的影响。结果表明，随着氢气添加量的增加，火焰速度、层流燃烧速度和质量燃烧速率均增大。增加氢与二甲醚加氢的比例将缩短燃烧持续期。在小掺氢量的情况下，Markstein长度随当量比的增大而减小，表明贫混合气比富混合气具有更好的火焰稳定性。在大掺氢量的情况下，马克斯坦长度随当量比的增加而增加，表明富氢混合气比纯氢混合气具有更好的火焰稳定性。
The laminar combustion characteristics of DME–hydrogen–air premixed mixture were studied at different equivalence ratios, ratios of hydrogen to DME plus hydrogen, and initial pressures by using a constant volume combustion bomb. The influences of the equivalence ratio, the hydrogen addition, and the initial pressure on flame speed and combustion characteristics are analyzed. The results show that the flame speed, the laminar burning velocity, and the mass burning rate increase with the increase of hydrogen addition. Increasing the ratio of hydrogen to DME plus hydrogen will shorten the combustion duration. In the case of small hydrogen addition, the Markstein length decreases with the increase of equivalence ratio, and this reveals that lean mixture has better flame front stability compared with that of the rich mixture. In the case of large hydrogen addition, the Markstein length increases with the increase of equivalence ratio, and this indicates that the rich mixture has better flame front stability th...