Biofuels spray and combustion characteristics in a new micro gas turbine combustion chamber design with internal exhaust recycling
The characteristics of atomization and combustion of biodiesel and palm oil were evaluated in this study. A new combustor design with internal exhaust gas recycling (iEGR) and internal fuel pre-evaporation was investigated numerically and then verified experimentally using micro gas turbine (MGT) te...
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Elsevier
2025-01-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X24016265 |
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| author | Mohammed R. Abdulwahab Khaled A. Al-attab Irfan Anjum Badruddin Muhammad Nasir Bashir Joon Sang Lee |
| author_facet | Mohammed R. Abdulwahab Khaled A. Al-attab Irfan Anjum Badruddin Muhammad Nasir Bashir Joon Sang Lee |
| author_sort | Mohammed R. Abdulwahab |
| collection | DOAJ |
| description | The characteristics of atomization and combustion of biodiesel and palm oil were evaluated in this study. A new combustor design with internal exhaust gas recycling (iEGR) and internal fuel pre-evaporation was investigated numerically and then verified experimentally using micro gas turbine (MGT) test rig. CFD evaluation of hydrodynamics flow of 8 iEGR mechanisms geometries showed that simple connection between the exhaust and recycle tube resulted in 0 % gas recycling due to the pressure difference. Low recycling <1 % can be obtained by adding gas guiding channels, while increasing mass recycling from 3 % to 8 % was achieved by adding annular tubes with careful control of differential pressure using pressure relief holes. Experimental cold-fuel-flow spray atomization quality was investigated using high-shutter-speed camera. Increasing palm oil flow from 60 ml/min to 120 ml/min significantly increased the spray angle from 1.8° to 21° while average droplet diameter reduced from 665 μm to 148 μm. Minimum CO emissions in the range of 132–135 ppm for diesel and biodiesel were achieved due to their better atomization compared to palm oil which resulted in slightly higher value of 207 ppm. The opposite effect was observed for NOx emissions where it elevated at the higher combustion temperature, where all the fuels showed comparable values in the range of 32–39 ppm. On the other hand, diesel suffered from its higher TIT value that reached 800 °C, compared to 785 °C and 762 °C for palm oil and biodiesel, respectively. |
| format | Article |
| id | doaj-art-6fc2b7e889ab45e49bd99027e163d754 |
| institution | Kabale University |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
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| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-6fc2b7e889ab45e49bd99027e163d7542025-01-08T04:52:36ZengElsevierCase Studies in Thermal Engineering2214-157X2025-01-0165105595Biofuels spray and combustion characteristics in a new micro gas turbine combustion chamber design with internal exhaust recyclingMohammed R. Abdulwahab0Khaled A. Al-attab1Irfan Anjum Badruddin2Muhammad Nasir Bashir3Joon Sang Lee4Northern Technical University, Technical College of Mosul, Mosul, Iraq; School of Mechanical Engineering, Engineering Campus, Universiti Sains Malaysia, 14300, Nibong Tebal, Penang, MalaysiaSchool of Mechanical Engineering, Engineering Campus, Universiti Sains Malaysia, 14300, Nibong Tebal, Penang, Malaysia; Corresponding author.Mechanical Engineering Department, College of Engineering, King Khalid University, Abha, 61421, Saudi Arabia; Corresponding author.Department of Mechanical Engineering, Yonsei University, Seoul, 120-749, Republic of KoreaDepartment of Mechanical Engineering, Yonsei University, Seoul, 120-749, Republic of Korea; Corresponding author.The characteristics of atomization and combustion of biodiesel and palm oil were evaluated in this study. A new combustor design with internal exhaust gas recycling (iEGR) and internal fuel pre-evaporation was investigated numerically and then verified experimentally using micro gas turbine (MGT) test rig. CFD evaluation of hydrodynamics flow of 8 iEGR mechanisms geometries showed that simple connection between the exhaust and recycle tube resulted in 0 % gas recycling due to the pressure difference. Low recycling <1 % can be obtained by adding gas guiding channels, while increasing mass recycling from 3 % to 8 % was achieved by adding annular tubes with careful control of differential pressure using pressure relief holes. Experimental cold-fuel-flow spray atomization quality was investigated using high-shutter-speed camera. Increasing palm oil flow from 60 ml/min to 120 ml/min significantly increased the spray angle from 1.8° to 21° while average droplet diameter reduced from 665 μm to 148 μm. Minimum CO emissions in the range of 132–135 ppm for diesel and biodiesel were achieved due to their better atomization compared to palm oil which resulted in slightly higher value of 207 ppm. The opposite effect was observed for NOx emissions where it elevated at the higher combustion temperature, where all the fuels showed comparable values in the range of 32–39 ppm. On the other hand, diesel suffered from its higher TIT value that reached 800 °C, compared to 785 °C and 762 °C for palm oil and biodiesel, respectively.http://www.sciencedirect.com/science/article/pii/S2214157X24016265Liquid biofuelsCFDMicro gas turbineCombustionSpray atomizationExhaust gas recycling |
| spellingShingle | Mohammed R. Abdulwahab Khaled A. Al-attab Irfan Anjum Badruddin Muhammad Nasir Bashir Joon Sang Lee Biofuels spray and combustion characteristics in a new micro gas turbine combustion chamber design with internal exhaust recycling Case Studies in Thermal Engineering Liquid biofuels CFD Micro gas turbine Combustion Spray atomization Exhaust gas recycling |
| title | Biofuels spray and combustion characteristics in a new micro gas turbine combustion chamber design with internal exhaust recycling |
| title_full | Biofuels spray and combustion characteristics in a new micro gas turbine combustion chamber design with internal exhaust recycling |
| title_fullStr | Biofuels spray and combustion characteristics in a new micro gas turbine combustion chamber design with internal exhaust recycling |
| title_full_unstemmed | Biofuels spray and combustion characteristics in a new micro gas turbine combustion chamber design with internal exhaust recycling |
| title_short | Biofuels spray and combustion characteristics in a new micro gas turbine combustion chamber design with internal exhaust recycling |
| title_sort | biofuels spray and combustion characteristics in a new micro gas turbine combustion chamber design with internal exhaust recycling |
| topic | Liquid biofuels CFD Micro gas turbine Combustion Spray atomization Exhaust gas recycling |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X24016265 |
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