Numerical Simulation of Hydrogen Fueled Porous Burner
Porous media burners in comparison with free flame burners have major benefits such as higher thermal efficiency, stable flame in a wider range of stoichiometric ratios and feed flow rates, capability of using low calorific fuels and low production of pollutants. In the present study, premixed and l...
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| Format: | Article |
| Language: | English |
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The Japan Society of Mechanical Engineers
2013-11-01
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| Series: | Journal of Thermal Science and Technology |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jtst/8/3/8_555/_pdf/-char/en |
| _version_ | 1818394164465762304 |
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| author | Reza ROOHI Mohammad Hadi AKBARI Sepideh SAMGHANI |
| author_facet | Reza ROOHI Mohammad Hadi AKBARI Sepideh SAMGHANI |
| author_sort | Reza ROOHI |
| collection | DOAJ |
| description | Porous media burners in comparison with free flame burners have major benefits such as higher thermal efficiency, stable flame in a wider range of stoichiometric ratios and feed flow rates, capability of using low calorific fuels and low production of pollutants. In the present study, premixed and laminar combustion of hydrogen in a solid matrix with spongy lattice is simulated. The axisymmetric solid matrix is considered to be inert, isotropic and homogenous in the unsteady simulations. The burner consists of a divergent inlet followed by a constant area section. A multi-step chemical kinetics is implemented. Heat exchange between the solid and gas phases is simulated using an experimental correlation for volumetric convective heat transfer coefficient, and the diffusion approximation is used to simulate the radiation mechanism inside the solid matrix. All physical properties of the gas mixture are considered as functions of local temperature and mixture composition. The governing equations are discreted and solved by the control volume scheme and SIMPLE algorithm. The effects of certain parameters such as flow rate and physical properties of the solid matrix on the thermal/stability performance of the burner are analyzed. Increasing the feed flow rate causes upstream movement of the flame front and increase in the flame temperature and pollutant formation. The flammability limits are obtained in the range of stoichiometric ratios between 0.5 and 1.2, where the widest belongs to a stoichiometric mixture. |
| first_indexed | 2024-12-14T05:56:51Z |
| format | Article |
| id | doaj.art-0465eb604b7d4f1eb44c36ebce717419 |
| institution | Directory Open Access Journal |
| issn | 1880-5566 |
| language | English |
| last_indexed | 2024-12-14T05:56:51Z |
| publishDate | 2013-11-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Journal of Thermal Science and Technology |
| spelling | doaj.art-0465eb604b7d4f1eb44c36ebce7174192022-12-21T23:14:33ZengThe Japan Society of Mechanical EngineersJournal of Thermal Science and Technology1880-55662013-11-018355557010.1299/jtst.8.555jtstNumerical Simulation of Hydrogen Fueled Porous BurnerReza ROOHI0Mohammad Hadi AKBARI1Sepideh SAMGHANI2Department of Mechanical Engineering Shiraz UniversityDepartment of Mechanical Engineering Shiraz UniversityDepartment of Mechanical Engineering Shiraz UniversityPorous media burners in comparison with free flame burners have major benefits such as higher thermal efficiency, stable flame in a wider range of stoichiometric ratios and feed flow rates, capability of using low calorific fuels and low production of pollutants. In the present study, premixed and laminar combustion of hydrogen in a solid matrix with spongy lattice is simulated. The axisymmetric solid matrix is considered to be inert, isotropic and homogenous in the unsteady simulations. The burner consists of a divergent inlet followed by a constant area section. A multi-step chemical kinetics is implemented. Heat exchange between the solid and gas phases is simulated using an experimental correlation for volumetric convective heat transfer coefficient, and the diffusion approximation is used to simulate the radiation mechanism inside the solid matrix. All physical properties of the gas mixture are considered as functions of local temperature and mixture composition. The governing equations are discreted and solved by the control volume scheme and SIMPLE algorithm. The effects of certain parameters such as flow rate and physical properties of the solid matrix on the thermal/stability performance of the burner are analyzed. Increasing the feed flow rate causes upstream movement of the flame front and increase in the flame temperature and pollutant formation. The flammability limits are obtained in the range of stoichiometric ratios between 0.5 and 1.2, where the widest belongs to a stoichiometric mixture.https://www.jstage.jst.go.jp/article/jtst/8/3/8_555/_pdf/-char/enporous burnerthermal characteristicsmatrix structural propertiesreactants propertiespreheating zone efficiency |
| spellingShingle | Reza ROOHI Mohammad Hadi AKBARI Sepideh SAMGHANI Numerical Simulation of Hydrogen Fueled Porous Burner Journal of Thermal Science and Technology porous burner thermal characteristics matrix structural properties reactants properties preheating zone efficiency |
| title | Numerical Simulation of Hydrogen Fueled Porous Burner |
| title_full | Numerical Simulation of Hydrogen Fueled Porous Burner |
| title_fullStr | Numerical Simulation of Hydrogen Fueled Porous Burner |
| title_full_unstemmed | Numerical Simulation of Hydrogen Fueled Porous Burner |
| title_short | Numerical Simulation of Hydrogen Fueled Porous Burner |
| title_sort | numerical simulation of hydrogen fueled porous burner |
| topic | porous burner thermal characteristics matrix structural properties reactants properties preheating zone efficiency |
| url | https://www.jstage.jst.go.jp/article/jtst/8/3/8_555/_pdf/-char/en |
| work_keys_str_mv | AT rezaroohi numericalsimulationofhydrogenfueledporousburner AT mohammadhadiakbari numericalsimulationofhydrogenfueledporousburner AT sepidehsamghani numericalsimulationofhydrogenfueledporousburner |