Abstract
We studied the effects of increasing pressure and adding carbon dioxide, hydrogen and nitrogen to Methane-air mixture on premixed laminar burning velocity and NO formation in experimentally and numerically methods. Equivalence ratio was considered within 0.7 to 1.3 for initial pressure between 0.1 to 0.5 MPa and initial temperature was separately considered 298 K. Mole fractions of carbon dioxide, hydrogen and nitrogen were regarded in mixture from 0 to 0.2. Heat flux method was used for measurement of burning velocities of Methane-air mixtures diluted with CO2 and N2. Experimental results were compared to the calculations using a detailed chemical kinetic scheme (GRI-MECH 3.0). The results in atmosphere pressure for Methane-air mixture were calculated and compared with the results of literature. Results were in good agreement with published data in the literature. Then, by adding carbon dioxide and nitrogen to Methaneair mixture, we witnessed that laminar burning velocity was decreased, whereas by increasing hydrogen, the laminar burning velocity was increased. Finally, the results showed that by increasing the pressure, the premixed laminar burning velocity decreased for all mixtures, and NO formation indicates considerable increase, whereas the laminar flame thickness decreases.
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Peyman Zahedi received his M.Sc. in Mechanical Engineering in 2013 from Azad university of Mashhad in Iran. His research interests include combustion, multiphase flows, computational fluid dynamics and flow control.
Kianoosh Yousefi received his B.Sc. and M.Sc. in Mechanical Engineering from Azad university of Mashhad in 2009 and 2013, respectively. His research interests are in the area of aerodynamics, flow control, fluid mechanics, turbulent flows and combustion.
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Zahedi, P., Yousefi, K. Effects of pressure and carbon dioxide, hydrogen and nitrogen concentration on laminar burning velocities and NO formation of methane-air mixtures. J Mech Sci Technol 28, 377–386 (2014). https://doi.org/10.1007/s12206-013-0970-5
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DOI: https://doi.org/10.1007/s12206-013-0970-5