First and second thermodynamic-law analyses of hydrogen-air counter-flow diffusion combustion in various combustion modes

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• 作者：Sheng Chen^a ; ^b ; ^c ; ^{shengchen.hust@gmail.com} ; Jianchun Mi^d ; Hao Liu^a ; Chuguang Zheng^a
• 关键词：Counter-flow combustion ; Hydrogen-air diffusion combustion ; Flameless combustion ; High temperature air combustion ; Mild combustion ; Entropy generation
• 刊名：International Journal of Hydrogen Energy
• 出版年：2012
• 期刊代码：42_03603199
• 类别：ch
• 出版时间：March, 2012
• 卷：37
• 期：6
• 页码：5234-5245
• 文件大小：1411 K

摘要

In this paper, from the viewpoints of both the first and the second law of thermodynamics, we conduct a comprehensive study on hydrogen-air counter-flow diffusion combustion in various modes. The effects of air inlet temperature (T_oxi) and effective equivalence ratio of fuel (蠁) on the reaction zone structure and entropy generation of combustion are revealed over a wide range of T_oxi and 蠁. Through the present work, five interesting features of combustion of this kind, which are quite different from that reported in the literature, are presented. Especially, for the first time we divide various combustion modes in the 蠁聽鈭捖?em>T_oxi map instead of the popular way used in previous studies. Such innovation can help judge the final combustion regime more straightforwardly for any given operative condition.