Numerical Investigation of the Effects of Chemical Species and Chemical Kinetic Mechanisms on Laminar Premixed Flame-Acoustic Wave Interactions
Numerical simulation of interactions between acoustic waves and flames is of utmost importance in thermo-acoustic instability research. In this study, interactions between a one-dimensional Methane-Air laminar premixed flame and acoustic waves with a frequency of 50 to 50000 Hz are simulated by simu...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Isfahan University of Technology
2023-01-01
|
| Series: | Journal of Applied Fluid Mechanics |
| Subjects: | |
| Online Access: | https://www.jafmonline.net/article_2156_f3aacee3058828a63bb87ee7c54e518c.pdf |
| _version_ | 1797955993372459008 |
|---|---|
| author | E. Salimi Babokani M. Davazdah Emami A. R. Pishevar |
| author_facet | E. Salimi Babokani M. Davazdah Emami A. R. Pishevar |
| author_sort | E. Salimi Babokani |
| collection | DOAJ |
| description | Numerical simulation of interactions between acoustic waves and flames is of utmost importance in thermo-acoustic instability research. In this study, interactions between a one-dimensional Methane-Air laminar premixed flame and acoustic waves with a frequency of 50 to 50000 Hz are simulated by simultaneously solving the equations for energy conservation, chemical species transport, state and continuity in one-dimensional space. By assuming that the flame thickness is smaller than the acoustic wavelength, the spatial pressure fluctuations can be neglected and the flame experiences only a time-varying acoustic pressure. The GRI mechanisms, as well as their reduced mechanisms, are considered to obtain results for steady flames without acoustic waves, and the interaction of unsteady flames with acoustic waves. Results show that the total heat-release-rate fluctuations for the flame is affected by increasing the frequency of the acoustic wave. An increase in frequency first increases the total heat released, and then decreases it. The obtained results are in good agreement with those of other researchers. Furthermore, at the presence of acoustic waves, various chemical species can affect the total heat-release-rate fluctuations. With Rayleigh's instability criterion, it can be shown that H2O, CO2 and O2 are the main species to the fluctuations of the total heat release rate and lead to flame instability. Results show that heat-release-rate of H2O specie is the most important on the total heat-release-rate. Therefore, for the flame-acoustic waves interaction problem, the best mechanism is the one that could predict the concentration of H2O more precisely. |
| first_indexed | 2024-04-10T23:41:51Z |
| format | Article |
| id | doaj.art-bfc0b590420948de9e77c9a60312eef4 |
| institution | Directory Open Access Journal |
| issn | 1735-3572 1735-3645 |
| language | English |
| last_indexed | 2024-04-10T23:41:51Z |
| publishDate | 2023-01-01 |
| publisher | Isfahan University of Technology |
| record_format | Article |
| series | Journal of Applied Fluid Mechanics |
| spelling | doaj.art-bfc0b590420948de9e77c9a60312eef42023-01-11T08:00:19ZengIsfahan University of TechnologyJournal of Applied Fluid Mechanics1735-35721735-36452023-01-0116342944110.47176/jafm.16.03.14382156Numerical Investigation of the Effects of Chemical Species and Chemical Kinetic Mechanisms on Laminar Premixed Flame-Acoustic Wave InteractionsE. Salimi Babokani0M. Davazdah Emami1A. R. Pishevar2Department of Mechanical Engineering, Isfahan University of Technology, Isfahan 8415683111, IranDepartment of Mechanical Engineering, Isfahan University of Technology, Isfahan 8415683111, IranDepartment of Mechanical Engineering, Isfahan University of Technology, Isfahan 8415683111, IranNumerical simulation of interactions between acoustic waves and flames is of utmost importance in thermo-acoustic instability research. In this study, interactions between a one-dimensional Methane-Air laminar premixed flame and acoustic waves with a frequency of 50 to 50000 Hz are simulated by simultaneously solving the equations for energy conservation, chemical species transport, state and continuity in one-dimensional space. By assuming that the flame thickness is smaller than the acoustic wavelength, the spatial pressure fluctuations can be neglected and the flame experiences only a time-varying acoustic pressure. The GRI mechanisms, as well as their reduced mechanisms, are considered to obtain results for steady flames without acoustic waves, and the interaction of unsteady flames with acoustic waves. Results show that the total heat-release-rate fluctuations for the flame is affected by increasing the frequency of the acoustic wave. An increase in frequency first increases the total heat released, and then decreases it. The obtained results are in good agreement with those of other researchers. Furthermore, at the presence of acoustic waves, various chemical species can affect the total heat-release-rate fluctuations. With Rayleigh's instability criterion, it can be shown that H2O, CO2 and O2 are the main species to the fluctuations of the total heat release rate and lead to flame instability. Results show that heat-release-rate of H2O specie is the most important on the total heat-release-rate. Therefore, for the flame-acoustic waves interaction problem, the best mechanism is the one that could predict the concentration of H2O more precisely.https://www.jafmonline.net/article_2156_f3aacee3058828a63bb87ee7c54e518c.pdfflame-acoustic interactionrayleigh instabilitynumerical simulationacoustic wavesmultistep mechanisms |
| spellingShingle | E. Salimi Babokani M. Davazdah Emami A. R. Pishevar Numerical Investigation of the Effects of Chemical Species and Chemical Kinetic Mechanisms on Laminar Premixed Flame-Acoustic Wave Interactions Journal of Applied Fluid Mechanics flame-acoustic interaction rayleigh instability numerical simulation acoustic waves multistep mechanisms |
| title | Numerical Investigation of the Effects of Chemical Species and Chemical Kinetic Mechanisms on Laminar Premixed Flame-Acoustic Wave Interactions |
| title_full | Numerical Investigation of the Effects of Chemical Species and Chemical Kinetic Mechanisms on Laminar Premixed Flame-Acoustic Wave Interactions |
| title_fullStr | Numerical Investigation of the Effects of Chemical Species and Chemical Kinetic Mechanisms on Laminar Premixed Flame-Acoustic Wave Interactions |
| title_full_unstemmed | Numerical Investigation of the Effects of Chemical Species and Chemical Kinetic Mechanisms on Laminar Premixed Flame-Acoustic Wave Interactions |
| title_short | Numerical Investigation of the Effects of Chemical Species and Chemical Kinetic Mechanisms on Laminar Premixed Flame-Acoustic Wave Interactions |
| title_sort | numerical investigation of the effects of chemical species and chemical kinetic mechanisms on laminar premixed flame acoustic wave interactions |
| topic | flame-acoustic interaction rayleigh instability numerical simulation acoustic waves multistep mechanisms |
| url | https://www.jafmonline.net/article_2156_f3aacee3058828a63bb87ee7c54e518c.pdf |
| work_keys_str_mv | AT esalimibabokani numericalinvestigationoftheeffectsofchemicalspeciesandchemicalkineticmechanismsonlaminarpremixedflameacousticwaveinteractions AT mdavazdahemami numericalinvestigationoftheeffectsofchemicalspeciesandchemicalkineticmechanismsonlaminarpremixedflameacousticwaveinteractions AT arpishevar numericalinvestigationoftheeffectsofchemicalspeciesandchemicalkineticmechanismsonlaminarpremixedflameacousticwaveinteractions |