Burning syngas in a high swirl burner: effects of fuel composition
Flame characteristics of swirling non-premixed hydrogen-carbon monoxide syngas fuel mixtures have been simulated using large eddy simulation and detailed chemistry. The selected combustor configuration is the TECFLAM burner which has been used for extensive experimental investigations for natural ga...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
2013-07.
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| Subjects: | |
| Online Access: | Get fulltext |
| Summary: | Flame characteristics of swirling non-premixed hydrogen-carbon monoxide syngas fuel mixtures have been simulated using large eddy simulation and detailed chemistry. The selected combustor configuration is the TECFLAM burner which has been used for extensive experimental investigations for natural gas combustion. The large eddy simulation (LES) solves the governing equations on a structured Cartesian grid using a finite volume method, with turbulence and combustion modelling based on the localised dynamic Smagorinsky model and the steady laminar flamelet model respectively. The predictions for hydrogen-rich and carbon monoxide-rich flames show considerable differences between them for velocity and scalar fields and this demonstrates the effects of fuel variability on the flame characteristics in swirling environment. In general, the higher diffusivity of hydrogen in hydrogen-rich fuel is largely responsible for forming a much thicker flame with a larger vortex breakdown bubble (VBB) in a swirling flame compare to the hydrogen-lean but carbon dioxide-rich syngas flames. |
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