Numerical Characterization of Corona Spark Plugs and Its Effects on Radicals Production
A mono-dimensional code for the simulation of the effects of High Frequency Ignition systems (HFI) on the production of chemical radicals was developed and here presented. The simulations were carried out by considering the typical environmental thermodynamic conditions of a nowadays engine at full...
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MDPI AG
2021-01-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/14/2/381 |
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| author | Giorgio La Civita Francesco Orlandi Valerio Mariani Giulio Cazzoli Emanuele Ghedini |
| author_facet | Giorgio La Civita Francesco Orlandi Valerio Mariani Giulio Cazzoli Emanuele Ghedini |
| author_sort | Giorgio La Civita |
| collection | DOAJ |
| description | A mono-dimensional code for the simulation of the effects of High Frequency Ignition systems (HFI) on the production of chemical radicals was developed and here presented. The simulations were carried out by considering the typical environmental thermodynamic conditions of a nowadays engine at full load. An electron transport model is linked with a Boltzmann solver coupled with a chemistry solver, affecting the Electron Energy Distribution Function (EEDF) in order to obtain the physical conditions leading to the production of radical components for a given fuel mixture. The transport equations for the electrons, the positive and the negative ions, and the Gauss’ law in a steady-state plasma region. Then the Boltzmann equation for the electrons, in a spatially homogeneous steady-state case, is solved in order to obtain the EEDF. Finally the chemical kinetics model is employed assuming a fuel-air mixture neglecting the fuel carbon atoms due to the assumption that electron-impact dissociation reactions, which initiate the combustion, exhibit a greater reaction rate compared to those based on hydrocarbon thermal dissociation and therefore can be neglected in this work. Results show the production of the hydrogen (H), nitrogen (N), and oxygen (O) radicals and the radius of the initial discharge under different simulated engine operating conditions characterizing the role of a plasma corona effect for the induced chemical ignition in gasoline-powered engines. |
| first_indexed | 2024-03-09T05:08:25Z |
| format | Article |
| id | doaj.art-c33286cbb9b3455eb595f9dfdbf685d3 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-09T05:08:25Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-c33286cbb9b3455eb595f9dfdbf685d32023-12-03T12:52:50ZengMDPI AGEnergies1996-10732021-01-0114238110.3390/en14020381Numerical Characterization of Corona Spark Plugs and Its Effects on Radicals ProductionGiorgio La Civita0Francesco Orlandi1Valerio Mariani2Giulio Cazzoli3Emanuele Ghedini4Department of Industrial Engineering DIN, Università degli Studi di Bologna, Viale del Risorgimento 2, 40136 Bologna, ItalyDepartment of Industrial Engineering DIN, Università degli Studi di Bologna, Viale del Risorgimento 2, 40136 Bologna, ItalyDepartment of Industrial Engineering DIN, Università degli Studi di Bologna, Viale del Risorgimento 2, 40136 Bologna, ItalyDepartment of Industrial Engineering DIN, Università degli Studi di Bologna, Viale del Risorgimento 2, 40136 Bologna, ItalyDepartment of Industrial Engineering DIN, Università degli Studi di Bologna, Viale del Risorgimento 2, 40136 Bologna, ItalyA mono-dimensional code for the simulation of the effects of High Frequency Ignition systems (HFI) on the production of chemical radicals was developed and here presented. The simulations were carried out by considering the typical environmental thermodynamic conditions of a nowadays engine at full load. An electron transport model is linked with a Boltzmann solver coupled with a chemistry solver, affecting the Electron Energy Distribution Function (EEDF) in order to obtain the physical conditions leading to the production of radical components for a given fuel mixture. The transport equations for the electrons, the positive and the negative ions, and the Gauss’ law in a steady-state plasma region. Then the Boltzmann equation for the electrons, in a spatially homogeneous steady-state case, is solved in order to obtain the EEDF. Finally the chemical kinetics model is employed assuming a fuel-air mixture neglecting the fuel carbon atoms due to the assumption that electron-impact dissociation reactions, which initiate the combustion, exhibit a greater reaction rate compared to those based on hydrocarbon thermal dissociation and therefore can be neglected in this work. Results show the production of the hydrogen (H), nitrogen (N), and oxygen (O) radicals and the radius of the initial discharge under different simulated engine operating conditions characterizing the role of a plasma corona effect for the induced chemical ignition in gasoline-powered engines.https://www.mdpi.com/1996-1073/14/2/381corona ignitioncorona spark plugboltzmann equationelectron transport |
| spellingShingle | Giorgio La Civita Francesco Orlandi Valerio Mariani Giulio Cazzoli Emanuele Ghedini Numerical Characterization of Corona Spark Plugs and Its Effects on Radicals Production Energies corona ignition corona spark plug boltzmann equation electron transport |
| title | Numerical Characterization of Corona Spark Plugs and Its Effects on Radicals Production |
| title_full | Numerical Characterization of Corona Spark Plugs and Its Effects on Radicals Production |
| title_fullStr | Numerical Characterization of Corona Spark Plugs and Its Effects on Radicals Production |
| title_full_unstemmed | Numerical Characterization of Corona Spark Plugs and Its Effects on Radicals Production |
| title_short | Numerical Characterization of Corona Spark Plugs and Its Effects on Radicals Production |
| title_sort | numerical characterization of corona spark plugs and its effects on radicals production |
| topic | corona ignition corona spark plug boltzmann equation electron transport |
| url | https://www.mdpi.com/1996-1073/14/2/381 |
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