Exploring the Benefits of Annular Rectangular Rib for Enhancing Thermal Efficiency of Nonpremixed Micro-Combustor
Micro-combustor can provide the required thermal energy of micro-thermal photovoltaic (MTPV) systems. The performance of MTPV is greatly affected by the effectiveness of a micro-combustor. In this study, a numerical simulation was conducted to explore the benefits of annular rectangular rib for enha...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Hindawi Limited
2020-01-01
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| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2020/9410389 |
| _version_ | 1826998698898358272 |
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| author | Hongcai Wang Hongru Fang Bingqian Lou Shitu Abubakar Yuqiang Li Lei Meng |
| author_facet | Hongcai Wang Hongru Fang Bingqian Lou Shitu Abubakar Yuqiang Li Lei Meng |
| author_sort | Hongcai Wang |
| collection | DOAJ |
| description | Micro-combustor can provide the required thermal energy of micro-thermal photovoltaic (MTPV) systems. The performance of MTPV is greatly affected by the effectiveness of a micro-combustor. In this study, a numerical simulation was conducted to explore the benefits of annular rectangular rib for enhancing the thermal performance of a nonpremixed micro-combustor. Based on the investigations under various rib heights, rib positions, and inlet mass flow rates, it is found that the addition of annular rectangular ribs in the micro-combustor creates a turbulent zone in the combustion chamber, thereby enhancing the heat transfer efficiency between the inner wall of the combustion chamber and the burned gas. The micro-combustor with annular rectangular rib shows a higher and more uniform wall temperature. When the H2 mass flow is 7.438 × 10−8 kg/s and the air mass flow is 2.576 × 10−6 kg/s, the optimum dimensionless rib position is at l = 6/9 and r = 0.4. At this condition, the micro-combustor has the most effective and uniform heat transfer performance and shows significant decreases in entropy generation and exergy destruction. However, the optimum l and r significantly depend on the inlet mass flow of H2/air mixture. |
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| format | Article |
| id | doaj.art-43b61f037e7847068c695388ab7ebd96 |
| institution | Directory Open Access Journal |
| issn | 2090-9063 2090-9071 |
| language | English |
| last_indexed | 2025-02-18T10:18:16Z |
| publishDate | 2020-01-01 |
| publisher | Hindawi Limited |
| record_format | Article |
| series | Journal of Chemistry |
| spelling | doaj.art-43b61f037e7847068c695388ab7ebd962024-11-02T05:31:44ZengHindawi LimitedJournal of Chemistry2090-90632090-90712020-01-01202010.1155/2020/94103899410389Exploring the Benefits of Annular Rectangular Rib for Enhancing Thermal Efficiency of Nonpremixed Micro-CombustorHongcai Wang0Hongru Fang1Bingqian Lou2Shitu Abubakar3Yuqiang Li4Lei Meng5School of Energy Science and Engineering, Central South University, Changsha 410083, ChinaSchool of Energy Science and Engineering, Central South University, Changsha 410083, ChinaSchool of Energy Science and Engineering, Central South University, Changsha 410083, ChinaCollege of Mechanical and Electrical Engineering, Central South University, Changsha 410083, ChinaSchool of Energy Science and Engineering, Central South University, Changsha 410083, ChinaSchool of Automation, Wuhan University of Technology, Wuhan 430070, ChinaMicro-combustor can provide the required thermal energy of micro-thermal photovoltaic (MTPV) systems. The performance of MTPV is greatly affected by the effectiveness of a micro-combustor. In this study, a numerical simulation was conducted to explore the benefits of annular rectangular rib for enhancing the thermal performance of a nonpremixed micro-combustor. Based on the investigations under various rib heights, rib positions, and inlet mass flow rates, it is found that the addition of annular rectangular ribs in the micro-combustor creates a turbulent zone in the combustion chamber, thereby enhancing the heat transfer efficiency between the inner wall of the combustion chamber and the burned gas. The micro-combustor with annular rectangular rib shows a higher and more uniform wall temperature. When the H2 mass flow is 7.438 × 10−8 kg/s and the air mass flow is 2.576 × 10−6 kg/s, the optimum dimensionless rib position is at l = 6/9 and r = 0.4. At this condition, the micro-combustor has the most effective and uniform heat transfer performance and shows significant decreases in entropy generation and exergy destruction. However, the optimum l and r significantly depend on the inlet mass flow of H2/air mixture.http://dx.doi.org/10.1155/2020/9410389 |
| spellingShingle | Hongcai Wang Hongru Fang Bingqian Lou Shitu Abubakar Yuqiang Li Lei Meng Exploring the Benefits of Annular Rectangular Rib for Enhancing Thermal Efficiency of Nonpremixed Micro-Combustor Journal of Chemistry |
| title | Exploring the Benefits of Annular Rectangular Rib for Enhancing Thermal Efficiency of Nonpremixed Micro-Combustor |
| title_full | Exploring the Benefits of Annular Rectangular Rib for Enhancing Thermal Efficiency of Nonpremixed Micro-Combustor |
| title_fullStr | Exploring the Benefits of Annular Rectangular Rib for Enhancing Thermal Efficiency of Nonpremixed Micro-Combustor |
| title_full_unstemmed | Exploring the Benefits of Annular Rectangular Rib for Enhancing Thermal Efficiency of Nonpremixed Micro-Combustor |
| title_short | Exploring the Benefits of Annular Rectangular Rib for Enhancing Thermal Efficiency of Nonpremixed Micro-Combustor |
| title_sort | exploring the benefits of annular rectangular rib for enhancing thermal efficiency of nonpremixed micro combustor |
| url | http://dx.doi.org/10.1155/2020/9410389 |
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