Effect of hydrocarbon addition on tip opening of hydrogen-air bunsen flames
| Autor: | E.V. Jithin, Robin John Varghese, T. Guru Prasad, Akram Mohammad, Sudarshan Kumar, Ratna Kishore Velamati |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Hydrogen Flame structure Analytical chemistry Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology 010402 general chemistry Mole fraction 01 natural sciences law.invention chemistry.chemical_compound law Propane chemistry.chemical_classification Renewable Energy Sustainability and the Environment Butane 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Fuel Technology Hydrocarbon chemistry Bunsen burner Combustor 0210 nano-technology |
| Zdroj: | International Journal of Hydrogen Energy. 46:5763-5775 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2020.10.166 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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