Experimental investigation of the ignition dynamics in a premixed annular combustor using a pre-chamber ignition system
In this paper, the ignition characteristics in a MICCA-type annular combustor are studied for the first time using a pre-chamber combustion (PCC) system. The PCC is proposed to replace the traditional spark electrode ignitor in the annular combustor, aiming to shorten ignition time and prevent misfi...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-10-01
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| Series: | Energy Conversion and Management: X |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590174524002320 |
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| author | Haroun Hassan Hui Wang Elsayed Barakat Chenghao Qian Haiwen Ge Zhixin Zhu Gaofeng Wang |
| author_facet | Haroun Hassan Hui Wang Elsayed Barakat Chenghao Qian Haiwen Ge Zhixin Zhu Gaofeng Wang |
| author_sort | Haroun Hassan |
| collection | DOAJ |
| description | In this paper, the ignition characteristics in a MICCA-type annular combustor are studied for the first time using a pre-chamber combustion (PCC) system. The PCC is proposed to replace the traditional spark electrode ignitor in the annular combustor, aiming to shorten ignition time and prevent misfiring. The PCC system is commonly utilized to initiate the ignition process in internal combustion (IC) engines by generating high-temperature turbulent jets that ignite the fuel/air mixture in the main combustion chamber (MCC). The PCC is integrated into a premixed annular combustor consists of sixteen swirling burners. The ignition characteristics and flame propagation patterns are investigated using a high-speed camera under varying conditions of equivalence ratios, bulk velocities, and thermal power levels. Experimental results demonstrate that the PCC exhibits a high ignition response without misfire. The induced turbulent jet from the PCC is observed to propagate into both sides of the annular combustor with high energy, creating a significant initial flame area along the jet trajectory. This enhances the ignition probability compared to traditional spark electrode ignition systems. Due to the higher burning rate resulting from the jet ignition, the light-round time is reduced by 41 % compared to traditional spark electrode ignition systems operating at the same equivalence ratio of 0.81 and the same bulk velocity of 3.22 m/s. This improvement is particularly advantageous for high-altitude re-ignition scenarios. |
| format | Article |
| id | doaj-art-7146a42c88a14c86b6578719782afda9 |
| institution | Kabale University |
| issn | 2590-1745 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Energy Conversion and Management: X |
| spelling | doaj-art-7146a42c88a14c86b6578719782afda92024-12-18T08:51:32ZengElsevierEnergy Conversion and Management: X2590-17452024-10-0124100754Experimental investigation of the ignition dynamics in a premixed annular combustor using a pre-chamber ignition systemHaroun Hassan0Hui Wang1Elsayed Barakat2Chenghao Qian3Haiwen Ge4Zhixin Zhu5Gaofeng Wang6School of Aeronautics and Astronautics, Zhejiang University, Hangzhou 310027, China; Mechanical Power Department, Faculty of Energy Engineering, Aswan University, Aswan 81528, EgyptSchool of Aero-engine, Shenyang Aerospace University, 110136, ChinaSchool of Aeronautics and Astronautics, Zhejiang University, Hangzhou 310027, China; Huanjiang Laboratory, Zhejiang University, Zhuji 311899, China; Mechanical Power Engineering Department, Faculty of Engineering, Mansoura University, El-Mansoura 35516, EgyptSchool of Aeronautics and Astronautics, Zhejiang University, Hangzhou 310027, ChinaZhejiang Laboratory, Hangzhou 311121, ChinaSchool of Aeronautics and Astronautics, Zhejiang University, Hangzhou 310027, ChinaSchool of Aeronautics and Astronautics, Zhejiang University, Hangzhou 310027, China; Corresponding author.In this paper, the ignition characteristics in a MICCA-type annular combustor are studied for the first time using a pre-chamber combustion (PCC) system. The PCC is proposed to replace the traditional spark electrode ignitor in the annular combustor, aiming to shorten ignition time and prevent misfiring. The PCC system is commonly utilized to initiate the ignition process in internal combustion (IC) engines by generating high-temperature turbulent jets that ignite the fuel/air mixture in the main combustion chamber (MCC). The PCC is integrated into a premixed annular combustor consists of sixteen swirling burners. The ignition characteristics and flame propagation patterns are investigated using a high-speed camera under varying conditions of equivalence ratios, bulk velocities, and thermal power levels. Experimental results demonstrate that the PCC exhibits a high ignition response without misfire. The induced turbulent jet from the PCC is observed to propagate into both sides of the annular combustor with high energy, creating a significant initial flame area along the jet trajectory. This enhances the ignition probability compared to traditional spark electrode ignition systems. Due to the higher burning rate resulting from the jet ignition, the light-round time is reduced by 41 % compared to traditional spark electrode ignition systems operating at the same equivalence ratio of 0.81 and the same bulk velocity of 3.22 m/s. This improvement is particularly advantageous for high-altitude re-ignition scenarios.http://www.sciencedirect.com/science/article/pii/S2590174524002320Pre-chamberAnnular combustorTurbulent jetIgnition characteristics |
| spellingShingle | Haroun Hassan Hui Wang Elsayed Barakat Chenghao Qian Haiwen Ge Zhixin Zhu Gaofeng Wang Experimental investigation of the ignition dynamics in a premixed annular combustor using a pre-chamber ignition system Energy Conversion and Management: X Pre-chamber Annular combustor Turbulent jet Ignition characteristics |
| title | Experimental investigation of the ignition dynamics in a premixed annular combustor using a pre-chamber ignition system |
| title_full | Experimental investigation of the ignition dynamics in a premixed annular combustor using a pre-chamber ignition system |
| title_fullStr | Experimental investigation of the ignition dynamics in a premixed annular combustor using a pre-chamber ignition system |
| title_full_unstemmed | Experimental investigation of the ignition dynamics in a premixed annular combustor using a pre-chamber ignition system |
| title_short | Experimental investigation of the ignition dynamics in a premixed annular combustor using a pre-chamber ignition system |
| title_sort | experimental investigation of the ignition dynamics in a premixed annular combustor using a pre chamber ignition system |
| topic | Pre-chamber Annular combustor Turbulent jet Ignition characteristics |
| url | http://www.sciencedirect.com/science/article/pii/S2590174524002320 |
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