Effect of a single nanosecond pulsed discharge on a flat methane–air flame
Successful implementation of plasma-assisted combustion in applied thermal processes heavily relies on how the plasma can be formed as it interacts with the reactive flow and what the effects are of such a plasma on the combustion process. The current study is an experimental investigation of a plas...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-12-01
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| Series: | Applications in Energy and Combustion Science |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666352X23000870 |
| _version_ | 1797682996077133824 |
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| author | Yupan Bao Chengdong Kong Jonas Ravelid Jinguo Sun Sebastian Nilsson Elias Kristensson Andreas Ehn |
| author_facet | Yupan Bao Chengdong Kong Jonas Ravelid Jinguo Sun Sebastian Nilsson Elias Kristensson Andreas Ehn |
| author_sort | Yupan Bao |
| collection | DOAJ |
| description | Successful implementation of plasma-assisted combustion in applied thermal processes heavily relies on how the plasma can be formed as it interacts with the reactive flow and what the effects are of such a plasma on the combustion process. The current study is an experimental investigation of a plasma-assisted lifted flat methane–air flame by a nanosecond pulsed discharge at atmospheric pressure. The nanosecond pulsed discharge, with a pulse duration of 4 ns and an amplitude of 30 kV to 50 kV, is used to stimulate the flame with a repetition rate of 1 Hz. The flame/plasma interactions are investigated with electrical and optical/laser diagnostics to study plasma-formation and its effect on the temperatures and formaldehyde formation. The flame speed seems to be accelerated for tens of milliseconds after the plasma stimulation, without noticeable gas temperature increase at the flame front and in the post-flame region. Formaldehyde is formed in the unburnt region while there is a slight increase in formaldehyde signal in the preheat zone. These results show that a volumetric effect of plasma-assisted combustion can be achieved with a short nanosecond plasma from a single excitation. |
| first_indexed | 2024-03-12T00:07:59Z |
| format | Article |
| id | doaj.art-382272179e3243c99128cf136cd7c06d |
| institution | Directory Open Access Journal |
| issn | 2666-352X |
| language | English |
| last_indexed | 2024-03-12T00:07:59Z |
| publishDate | 2023-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Applications in Energy and Combustion Science |
| spelling | doaj.art-382272179e3243c99128cf136cd7c06d2023-09-16T05:31:47ZengElsevierApplications in Energy and Combustion Science2666-352X2023-12-0116100198Effect of a single nanosecond pulsed discharge on a flat methane–air flameYupan Bao0Chengdong Kong1Jonas Ravelid2Jinguo Sun3Sebastian Nilsson4Elias Kristensson5Andreas Ehn6Department of Combustion Physics, Lund University, Lund, SE 221 00, SwedenDepartment of Combustion Physics, Lund University, Lund, SE 221 00, Sweden; Institute of Thermal Energy Engineering, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, People’s Republic of ChinaDepartment of Combustion Physics, Lund University, Lund, SE 221 00, SwedenDepartment of Combustion Physics, Lund University, Lund, SE 221 00, SwedenDepartment of Combustion Physics, Lund University, Lund, SE 221 00, SwedenDepartment of Combustion Physics, Lund University, Lund, SE 221 00, SwedenDepartment of Combustion Physics, Lund University, Lund, SE 221 00, Sweden; Corresponding author.Successful implementation of plasma-assisted combustion in applied thermal processes heavily relies on how the plasma can be formed as it interacts with the reactive flow and what the effects are of such a plasma on the combustion process. The current study is an experimental investigation of a plasma-assisted lifted flat methane–air flame by a nanosecond pulsed discharge at atmospheric pressure. The nanosecond pulsed discharge, with a pulse duration of 4 ns and an amplitude of 30 kV to 50 kV, is used to stimulate the flame with a repetition rate of 1 Hz. The flame/plasma interactions are investigated with electrical and optical/laser diagnostics to study plasma-formation and its effect on the temperatures and formaldehyde formation. The flame speed seems to be accelerated for tens of milliseconds after the plasma stimulation, without noticeable gas temperature increase at the flame front and in the post-flame region. Formaldehyde is formed in the unburnt region while there is a slight increase in formaldehyde signal in the preheat zone. These results show that a volumetric effect of plasma-assisted combustion can be achieved with a short nanosecond plasma from a single excitation.http://www.sciencedirect.com/science/article/pii/S2666352X23000870Plasma-assisted combustionNon-thermal plasmaNanosecond dischargeFlat flameLaser diagnosticsAtmospheric pressure plasma |
| spellingShingle | Yupan Bao Chengdong Kong Jonas Ravelid Jinguo Sun Sebastian Nilsson Elias Kristensson Andreas Ehn Effect of a single nanosecond pulsed discharge on a flat methane–air flame Applications in Energy and Combustion Science Plasma-assisted combustion Non-thermal plasma Nanosecond discharge Flat flame Laser diagnostics Atmospheric pressure plasma |
| title | Effect of a single nanosecond pulsed discharge on a flat methane–air flame |
| title_full | Effect of a single nanosecond pulsed discharge on a flat methane–air flame |
| title_fullStr | Effect of a single nanosecond pulsed discharge on a flat methane–air flame |
| title_full_unstemmed | Effect of a single nanosecond pulsed discharge on a flat methane–air flame |
| title_short | Effect of a single nanosecond pulsed discharge on a flat methane–air flame |
| title_sort | effect of a single nanosecond pulsed discharge on a flat methane air flame |
| topic | Plasma-assisted combustion Non-thermal plasma Nanosecond discharge Flat flame Laser diagnostics Atmospheric pressure plasma |
| url | http://www.sciencedirect.com/science/article/pii/S2666352X23000870 |
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