The behaviour of lifted oxy-fuel flames in burners with separated jets
| Autor: | Toufik Boushaki, L. Salentey, J.C. Sautet, Bernard Labegorre |
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| Rok vydání: | 2007 |
| Předmět: |
Materials science
business.industry Turbulence Astrophysics::High Energy Astrophysical Phenomena General Chemical Engineering chemistry.chemical_element Escape velocity Mechanics Condensed Matter Physics Combustion Oxygen Atomic and Molecular Physics and Optics Methane chemistry.chemical_compound chemistry Natural gas Combustor High Energy Physics::Experiment Physics::Chemical Physics Gas burner business |
| Zdroj: | International Communications in Heat and Mass Transfer. 34:8-18 |
| ISSN: | 0735-1933 |
| Popis: | Oxy-fuel combustion in separated-jet burners has been proven to increase thermal efficiency and to have a potential for NOx emission reduction. This paper presents an investigation into confined, turbulent, oxy-flames generated by a burner consisting of a central natural gas jet surrounded by two oxygen jets. The study is focused on the identifying the influence of burner parameters on the flame characteristics and topology, namely stability, lift-off height and flame length. The effects of the natural gas and oxygen jet exit velocities, the distance separating the jets and the deflection of oxygen jets towards the natural gas jet are examined. The OH chemiluminescence. Results show that the lift-off heights increase when jet exit velocities and the distance separating the jets are increased. The deflection of oxygen jets decreases the lift-off height and increases the volume of flame in the transversal plane. The flame length increases principally with the oxygen exit velocity and the separation distance, and decreases considerably when the angle of oxygen jets is increased. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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