Abstract
Laminar flame speeds of n-butanol/air premixed flames were measured experimentally and numerically at elevated pressures and temperatures for a wide range of equivalence ratios. Laminar flame speeds were obtained experimentally from the temporal evaluation of the flame front of spherically outwardly propagating flames at zero stress rate. The shadowgraph technique was employed to gain optical access to the constant volume combustion chamber. Flame propagation images were captured by a high-speed camera and MATLAB codes were used to process the images and calculate laminar flame speeds. Flame speeds have been calculated numerically using CHEMKIN-Pro based on a short reaction mechanism for n-butanol oxidation, which was derived from a previously published full reaction mechanism. Numerical predictions were in qualitative agreement with experimental data. The effects of initial pressure and temperature elevation were analyzed. Also, the effect of simultaneous elevation of initial pressures and temperatures is documented. For all experimental conditions, the maximum flame speed was found at around equivalence ratio 1.1. In general, flame speeds decreased with the elevation of initial pressure and increased with initial temperature elevation.
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Niladri Talukder received B.Sc. in Mechanical Engineering from Khulna University of Engineering and Technology, Bangladesh, in 2013. He completed a M.S. in Mechanical Engineering from Andong National University, South Korea, in 2017. During his M.S. program, he worked as graduate research assistant in the combustion laboratory at the Department of Mechanical Engineering at Andong National University. He experimentally studied laminar flame speeds of different alternative fuels.
Ki Yong Lee received his B.S. in Mechanical Engineering from Inha University in 1986. He received his M.S. and Ph.D. degrees from the University of Illinois at Chicago. Currently, he is a Professor of the Department of Mechanical Engineering at Andong National University. His current research interests include the reduction of detailed chemical kinetic mechanism and their application, investigation of NOx reduction in an acoustic and an electric field, oxygen enhanced combustion, fluid dynamics of multiphase chemically reacting flows, catalyst combustion, and biomass energy.
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Talukder, N., Lee, K.Y. Laminar flame speeds for n-butanol/air mixtures at elevated pressures and temperatures: An experimental and numerical study. J Mech Sci Technol 32, 1827–1834 (2018). https://doi.org/10.1007/s12206-018-0339-x
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DOI: https://doi.org/10.1007/s12206-018-0339-x