Numerical Investigation of the Combustion in an Improved Microcombustion Chamber with Rib
This study proposes an improved microcombustor with a rectangular rib to improve the temperature level of the combustor wall. Moreover, the OH mass fraction, temperature distribution, and outer wall temperature of the original and improved combustors of premixed hydrogen/air flames are numerically i...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2019/8354541 |
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| author | Hai Chen Wei-qiang Liu |
| author_facet | Hai Chen Wei-qiang Liu |
| author_sort | Hai Chen |
| collection | DOAJ |
| description | This study proposes an improved microcombustor with a rectangular rib to improve the temperature level of the combustor wall. Moreover, the OH mass fraction, temperature distribution, and outer wall temperature of the original and improved combustors of premixed hydrogen/air flames are numerically investigated under various inlet velocities and equivalence ratios. Results show that the improved microcombustor enhances heat transfer between the mixture and wall because its recirculation zone is larger than that of the original, thereby resulting in high wall temperature. Conversely, thermal resistance in the horizontal direction increases with upstream and downstream step lengths. Consequently, the outer wall temperature decreases with step length in the improved combustor. A high equivalence ratio (e.g., 0.6) may result in the destruction of the combustor because the wall temperature has exceeded the acceptable temperature of wall material quartz. Therefore, the improved microcombustor is recommended for micro-thermo-photovoltaic systems. |
| format | Article |
| id | doaj-art-1f16b40afa5d40508611cb40e3aaaedf |
| institution | Kabale University |
| issn | 2090-9063 2090-9071 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Chemistry |
| spelling | doaj-art-1f16b40afa5d40508611cb40e3aaaedf2025-02-03T01:06:47ZengWileyJournal of Chemistry2090-90632090-90712019-01-01201910.1155/2019/83545418354541Numerical Investigation of the Combustion in an Improved Microcombustion Chamber with RibHai Chen0Wei-qiang Liu1College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, ChinaCollege of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, ChinaThis study proposes an improved microcombustor with a rectangular rib to improve the temperature level of the combustor wall. Moreover, the OH mass fraction, temperature distribution, and outer wall temperature of the original and improved combustors of premixed hydrogen/air flames are numerically investigated under various inlet velocities and equivalence ratios. Results show that the improved microcombustor enhances heat transfer between the mixture and wall because its recirculation zone is larger than that of the original, thereby resulting in high wall temperature. Conversely, thermal resistance in the horizontal direction increases with upstream and downstream step lengths. Consequently, the outer wall temperature decreases with step length in the improved combustor. A high equivalence ratio (e.g., 0.6) may result in the destruction of the combustor because the wall temperature has exceeded the acceptable temperature of wall material quartz. Therefore, the improved microcombustor is recommended for micro-thermo-photovoltaic systems.http://dx.doi.org/10.1155/2019/8354541 |
| spellingShingle | Hai Chen Wei-qiang Liu Numerical Investigation of the Combustion in an Improved Microcombustion Chamber with Rib Journal of Chemistry |
| title | Numerical Investigation of the Combustion in an Improved Microcombustion Chamber with Rib |
| title_full | Numerical Investigation of the Combustion in an Improved Microcombustion Chamber with Rib |
| title_fullStr | Numerical Investigation of the Combustion in an Improved Microcombustion Chamber with Rib |
| title_full_unstemmed | Numerical Investigation of the Combustion in an Improved Microcombustion Chamber with Rib |
| title_short | Numerical Investigation of the Combustion in an Improved Microcombustion Chamber with Rib |
| title_sort | numerical investigation of the combustion in an improved microcombustion chamber with rib |
| url | http://dx.doi.org/10.1155/2019/8354541 |
| work_keys_str_mv | AT haichen numericalinvestigationofthecombustioninanimprovedmicrocombustionchamberwithrib AT weiqiangliu numericalinvestigationofthecombustioninanimprovedmicrocombustionchamberwithrib |