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IS-MOBIL-Mobilitetsprogr.f.utl.Ph.D-stu

Application of the Eddy Dissipation Concept (EDC) model to the numerical simulation of oxyfuel combustion

Awarded: NOK 22,000

Project Number:

195638

Project Period:

2009 - 2009

Subject Fields:

Oxyfuel combustion is a process of burning fuel in a boiler in a mixture of oxygen and recirculated flue gas, thereby eliminating the presence of atmospheric nitrogen in the flue gas. This allows for a relatively easy separation of carbon dioxide from the flue gas which is a prerequisite for carbon dioxide sequestration. In the scope of future power generation technologies aiming at strongly reduced emissions of carbon dioxide, oxyfuel combustion is a promising option. In order to create optimized burner and furnace designs for oxyfuel conditions, the utilization of numerical simulation of turbulent combustion is of significant importance. One key element of simulating turbulent combustion is the proper modeling of turbulence/chemistry interaction as it d etermines fundamental flame properties like ignition, local extinction or flame stability. Within this project the Eddy Dissipation Concept (EDC), a numerical model for turbulence/chemistry interaction, will be adapted for the use in oxyfuel conditions in order to increase the accuracy of the simulations and to capture further aspects like pollutants formation. The current challenges are to properly account for the interaction between combustion within turbulent fine structures and the surrounding fluid a s well as the inclusion of transient effects. The adapted model would provide the possibility to predict oxyfuel combustion more accurately using numerical methods. This would allow for improved oxyfuel burner and furnace design which is a prerequisite fo r the successful application of this low emissions technology in industrial scale.

Funding scheme:

IS-MOBIL-Mobilitetsprogr.f.utl.Ph.D-stu