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标题：Experimental and Numerical Study on the Effect of Dilution in Premixed CH4-Air Flame
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作者：M. Mahmoodi Arya ; A. Fahimirad ; P. Baziar 等
期刊名称：International Journal of Mechatronics, Electrical and Computer Technology
印刷版ISSN：2305-0543
出版年度：2014
卷号：4
期号：12
页码：1155-1174
出版社：Austrian E-Journals of Universal Scientific Organization
摘要：Dilution is considered as a method, which reduces the temperature of furnace and decreases the formation of thermal NO. All of the NOx controlling methods are based on the control of temperature or limiting the concentration of O2. In this study, the numerical and experimental effects of N2 and CO2 diluents on a premixed methane–air flame in a furnace are investigated. This experimental study is achieved by use of a cylindrical furnace for an equivalence ratio from 0.6 to 1.4 and different dilution ratios. The simulation is carried out by using a premix code of the CHEMKIN II software. The GRI-Mech 3.0 detailed reaction mechanism is employed for the combustion of methane. Numerical and experimental results show that the maximum temperature of a flame and the rate of NOx production are reduced by the increase of the dilution ratio. The results also demonstrate the fact that a CO2 diluent is more effective than an N2 due to its high thermal capacity that reduces the NOx production rate more than the N2 can.
关键词：Dilution; NOx; Experimental; Numerical; Premixed