Direct Numerical Simulation of biomass pyrolysis and combustion with gas phase reactions
| Autor: | A. Awasthi, Jgm Hans Kuerten, Bernardus J. Geurts |
|---|---|
| Přispěvatelé: | Power & Flow, Fluids and Flows, Group Kuerten |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
History
Chromatography Chemistry Biomass Thermodynamics 02 engineering and technology Combustion 01 natural sciences 010305 fluids & plasmas Computer Science Applications Education METIS-320897 IR-103046 020401 chemical engineering Volume (thermodynamics) 0103 physical sciences Volume fraction Particle Char Particle size EWI-27440 0204 chemical engineering Physics::Chemical Physics Pyrolysis |
| Zdroj: | 7th European Thermal-Sciences Conference (Eurotherm2016): 19–23 June 2016, Krakow, Poland 7th European Thermal-Sciences Conference (Eurotherm2016) Journal of Physics: Conference Series, 745(3):032119. Institute of Physics |
| ISSN: | 1742-6596 1742-6588 |
| DOI: | 10.1088/1742-6596/745/3/032119 |
| Popis: | We present Direct Numerical Simulation of biomass pyrolysis and combustion in a turbulent channel flow. The model includes simplified models for biomass pyrolysis and char combustion along with a model for particle tracking. The gas phase is modelled as a mixture of reacting gas species. The gas-particle interactions for mass, momentum, and energy exchange are included by two-way coupling terms. The effect of two-way coupling on the conversion time of biomass particles is found noticeable for particle volume fractions > 10-5. We also observe that at constant volume fraction the effect of two-way coupling increases as the particle size is reduced, due to the higher total heat exchange area in case of smaller particles. The inclusion of gas phase homogeneous reactions in the DNS model decreases the biomass pyrolysis time due to higher gas temperatures. In contrast, including gas phase reactions increases the combustion time of biomass due to the lower concentration of oxygen at the particle surface. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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