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Numerical Characterization of Corona Spark Plugs and Its Effects on Radicals Production

Author

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  • Giorgio La Civita

    (Department of Industrial Engineering DIN, Università degli Studi di Bologna, Viale del Risorgimento 2, 40136 Bologna, Italy
    These authors contributed equally to this work.)

  • Francesco Orlandi

    (Department of Industrial Engineering DIN, Università degli Studi di Bologna, Viale del Risorgimento 2, 40136 Bologna, Italy
    These authors contributed equally to this work.)

  • Valerio Mariani

    (Department of Industrial Engineering DIN, Università degli Studi di Bologna, Viale del Risorgimento 2, 40136 Bologna, Italy
    These authors contributed equally to this work.)

  • Giulio Cazzoli

    (Department of Industrial Engineering DIN, Università degli Studi di Bologna, Viale del Risorgimento 2, 40136 Bologna, Italy)

  • Emanuele Ghedini

    (Department of Industrial Engineering DIN, Università degli Studi di Bologna, Viale del Risorgimento 2, 40136 Bologna, Italy)

Abstract

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.

Suggested Citation

  • Giorgio La Civita & Francesco Orlandi & Valerio Mariani & Giulio Cazzoli & Emanuele Ghedini, 2021. "Numerical Characterization of Corona Spark Plugs and Its Effects on Radicals Production," Energies, MDPI, vol. 14(2), pages 1-22, January.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:2:p:381-:d:478810
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    Citations

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    Cited by:

    1. Karol Tucki & Olga Orynycz & Leszek Mieszkalski & Joao Gilberto Mendes dos Reis & Jonas Matijošius & Michał Wocial & Ivan Kuric & Simone Pascuzzi, 2023. "Analysis of the Influence of the Spark Plug on Exhaust Gas Composition," Energies, MDPI, vol. 16(11), pages 1-25, May.
    2. Bogdan Ulejczyk & Paweł Jóźwik & Łukasz Nogal & Michał Młotek & Krzysztof Krawczyk, 2022. "Efficient Conversion of Ethanol to Hydrogen in a Hybrid Plasma-Catalytic Reactor," Energies, MDPI, vol. 15(9), pages 1-11, April.
    3. Stefania Falfari & Giulio Cazzoli & Valerio Mariani & Gian Marco Bianchi, 2023. "Hydrogen Application as a Fuel in Internal Combustion Engines," Energies, MDPI, vol. 16(6), pages 1-13, March.
    4. Valerio Mariani & Giorgio La Civita & Leonardo Pulga & Edoardo Ugolini & Emanuele Ghedini & Stefania Falfari & Giulio Cazzoli & Gian Marco Bianchi & Claudio Forte, 2022. "Numerical Evaluation of the Effect of Fuel Blending with CO 2 and H 2 on the Very Early Corona-Discharge Behavior in Spark Ignited Engines," Energies, MDPI, vol. 15(4), pages 1-19, February.

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