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Effect of hydrocarbon addition on tip opening of hydrogen-air bunsen flames

Publication Type : Journal Article

Publisher : International Journal of Hydrogen Energy, Elsevier,

Source : International Journal of Hydrogen Energy, Elsevier, Volume 46, Issue 7, p.5763–5775 (2021)

Url : https://www.sciencedirect.com/science/article/abs/pii/S0360319920340155

Keywords : Flame stabilization, Hydrocarbon-hydrogen mixtures, Numerical simulation, Premixed flames, Tip opening

Campus : Coimbatore

School : School of Engineering

Department : Mechanical Engineering

Year : 2021

Abstract : The effect of hydrocarbon addition on tip opening of lean and stoichiometric hydrogen-air flames is studied computationally by performing two-dimensional numerical simulations. The numerical study reveals that the flame tip of the H2-air burner stabilized flame is open at lean and stoichiometric mixture conditions. The flame tip closes upon hydrocarbon addition. The tip closing is mainly affected by preferential diffusion of the multi-component mixture and the stretch effects. In the addition of light hydrocarbon (CH4), the tip closing starts at a higher percentage of hydrocarbon addition in H2-air flames. Whereas, upon the addition of heavy hydrocarbons such as propane and butane in H2-air flames, tip closing starts with a lesser amount of hydrocarbon addition. Temperature, OH mole fraction and heat release rate have been investigated, focusing on the flame structure at the tip. The tip opening regime diagram for H2–CH4-air, H2–C3H8-air and H2–C4H10-air mixtures are presented.

Cite this Research Publication : G. T Prasad, Jithin, E. V., Varghese, R. John, Kumar, S., Mohammad, A., and Dr. Ratna Kishore V., “Effect of hydrocarbon addition on tip opening of hydrogen-air bunsen flames”, International Journal of Hydrogen Energy, vol. 46, no. 7, pp. 5763–5775, 2021.

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