A Comparative CFD Study on Simulating Flameless Oxy-Fuel Combustion in a Pilot-Scale Furnace
The current study presents a method to model the flameless oxy-fuel system, with a comparative approach, as well as validation of the predictions. The validation has been done by comparing the predicted results with previously published experimental results from a 200 kW pilot furnace. A suction pyr...
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| Format: | Article |
| Language: | English |
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Wiley
2016-01-01
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| Series: | Journal of Combustion |
| Online Access: | http://dx.doi.org/10.1155/2016/6735971 |
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| author | Mersedeh Ghadamgahi Patrik Ölund Tomas Ekman Nils Andersson Pär Jönsson |
| author_facet | Mersedeh Ghadamgahi Patrik Ölund Tomas Ekman Nils Andersson Pär Jönsson |
| author_sort | Mersedeh Ghadamgahi |
| collection | DOAJ |
| description | The current study presents a method to model the flameless oxy-fuel system, with a comparative approach, as well as validation of the predictions. The validation has been done by comparing the predicted results with previously published experimental results from a 200 kW pilot furnace. A suction pyrometer has been used to measure the local temperature and concentrations of CO, CO2, and O2 at 24 different locations. A three-dimensional CFD model was developed and the validity of using different submodels describing turbulence and chemical reactions was evaluated. The standard k-ε model was compared with the realizable k-ε model for turbulence, while Probability Density Function (PDF) with either chemical equilibrium or the Steady Laminar Flamelet Model (SLFM) was evaluated for combustion. Radiation was described using a Discrete Ordinates Model (DOM) with weighted-sum-of-grey-gases model (WSGGM). The smallest deviation between predictions and experiments for temperature (1.2%) was found using the realizable k-ε model and the SLFM. This improvement affects the prediction of gaseous species as well since the deviation between predictions and experiments for CO2 volume percentages decreased from 6% to 1.5%. This provides a recommendation for model selections in further studies on flameless oxy-fuel combustion. |
| format | Article |
| id | doaj-art-0ef45fcaf01c4b8c9d372aeeb8fca766 |
| institution | Kabale University |
| issn | 2090-1968 2090-1976 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Combustion |
| spelling | doaj-art-0ef45fcaf01c4b8c9d372aeeb8fca7662025-02-03T05:47:54ZengWileyJournal of Combustion2090-19682090-19762016-01-01201610.1155/2016/67359716735971A Comparative CFD Study on Simulating Flameless Oxy-Fuel Combustion in a Pilot-Scale FurnaceMersedeh Ghadamgahi0Patrik Ölund1Tomas Ekman2Nils Andersson3Pär Jönsson4Ovako Sweden AB, Hofors, SwedenOvako Sweden AB, Hofors, SwedenAGA AB, The Linde Group, Stockholm, SwedenDepartment of Materials Science and Engineering, KTH Royal Institute of Technology, Stockholm, SwedenDepartment of Materials Science and Engineering, KTH Royal Institute of Technology, Stockholm, SwedenThe current study presents a method to model the flameless oxy-fuel system, with a comparative approach, as well as validation of the predictions. The validation has been done by comparing the predicted results with previously published experimental results from a 200 kW pilot furnace. A suction pyrometer has been used to measure the local temperature and concentrations of CO, CO2, and O2 at 24 different locations. A three-dimensional CFD model was developed and the validity of using different submodels describing turbulence and chemical reactions was evaluated. The standard k-ε model was compared with the realizable k-ε model for turbulence, while Probability Density Function (PDF) with either chemical equilibrium or the Steady Laminar Flamelet Model (SLFM) was evaluated for combustion. Radiation was described using a Discrete Ordinates Model (DOM) with weighted-sum-of-grey-gases model (WSGGM). The smallest deviation between predictions and experiments for temperature (1.2%) was found using the realizable k-ε model and the SLFM. This improvement affects the prediction of gaseous species as well since the deviation between predictions and experiments for CO2 volume percentages decreased from 6% to 1.5%. This provides a recommendation for model selections in further studies on flameless oxy-fuel combustion.http://dx.doi.org/10.1155/2016/6735971 |
| spellingShingle | Mersedeh Ghadamgahi Patrik Ölund Tomas Ekman Nils Andersson Pär Jönsson A Comparative CFD Study on Simulating Flameless Oxy-Fuel Combustion in a Pilot-Scale Furnace Journal of Combustion |
| title | A Comparative CFD Study on Simulating Flameless Oxy-Fuel Combustion in a Pilot-Scale Furnace |
| title_full | A Comparative CFD Study on Simulating Flameless Oxy-Fuel Combustion in a Pilot-Scale Furnace |
| title_fullStr | A Comparative CFD Study on Simulating Flameless Oxy-Fuel Combustion in a Pilot-Scale Furnace |
| title_full_unstemmed | A Comparative CFD Study on Simulating Flameless Oxy-Fuel Combustion in a Pilot-Scale Furnace |
| title_short | A Comparative CFD Study on Simulating Flameless Oxy-Fuel Combustion in a Pilot-Scale Furnace |
| title_sort | comparative cfd study on simulating flameless oxy fuel combustion in a pilot scale furnace |
| url | http://dx.doi.org/10.1155/2016/6735971 |
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