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Baigmohammadi, Mohammadreza, Tabejamaat, Sadegh, Kashir, Babak. (1393). A numerical study on the effects of hydrogen addition levels, wall thermal conductivity and inlet velocity on methane/air pre-mixed flame in a micro reactor. , 2(2), 103-119. doi: 10.22059/ees.2014.51879
Mohammadreza Baigmohammadi; Sadegh Tabejamaat; Babak Kashir. "A numerical study on the effects of hydrogen addition levels, wall thermal conductivity and inlet velocity on methane/air pre-mixed flame in a micro reactor". , 2, 2, 1393, 103-119. doi: 10.22059/ees.2014.51879
Baigmohammadi, Mohammadreza, Tabejamaat, Sadegh, Kashir, Babak. (1393). 'A numerical study on the effects of hydrogen addition levels, wall thermal conductivity and inlet velocity on methane/air pre-mixed flame in a micro reactor', , 2(2), pp. 103-119. doi: 10.22059/ees.2014.51879
Baigmohammadi, Mohammadreza, Tabejamaat, Sadegh, Kashir, Babak. A numerical study on the effects of hydrogen addition levels, wall thermal conductivity and inlet velocity on methane/air pre-mixed flame in a micro reactor. , 1393; 2(2): 103-119. doi: 10.22059/ees.2014.51879

A numerical study on the effects of hydrogen addition levels, wall thermal conductivity and inlet velocity on methane/air pre-mixed flame in a micro reactor

Energy Equipment and Systems
مقاله 1، دوره 2، شماره 2، آبان 2014، صفحه 103-119    اصل مقاله (2.39 M)
نوع مقاله: Research Paper
شناسه دیجیتال (DOI): 10.22059/ees.2014.51879
نویسندگان
Mohammadreza Baigmohammadi1؛ Sadegh Tabejamaat* 1؛ Babak Kashir2
1Department of Aerospace Engineering, Amirkabir University of Technology (Tehran Polytechnic), Hafez Ave., Tehran, 15875-4413, Iran
2Department of Aerospace Engineering, Amirkabir University of Technology (Tehran polytechnic), Hafez Ave., Tehran, 15875-4413
چکیده
In this study, the effect of the levels of hydrogen addition to methane-air premixed flame in a micro-stepped reactor has been studied numerically. In addition, the effects of mixture velocity and walls’ thermal conductivity (Kw) on the flame’s location, temperature, and species distribution in a micro reactor were calculated using a 2D numerical laminar steady code. The results showed that an increasing level of hydrogen in the methane-air mixture probably improves the combustion process in a micro reactor by intensifying the flame speed, adiabatic flame temperature and the generation of some crucial species (such as OH, H, HCO, HO2, and H2O2). Further, it was found that the addition of hydrogen to methane can shift the flame towards the inlet. In this way, it probably guarantees the flame’s presence in certain conditions compared to cases of no hydrogen addition. In conclusion, it is shown that the temperature distribution along the axis and the wall of the micro reactor can be dependent on the amounts of hydrogen added to the methane-air mixture.
کلیدواژه‌ها
Micro tube؛ step؛ methane؛ Air؛ Hydrogen؛ Reduced chemistry
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