Simulation, Design and Development of a High Frequency Corona Discharge Ignition System

Varma, Arun Ravi; Thomas, Shijo

doi:10.4271/2013-26-0014

Cited by 8 publications

(4 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In [13], Tochikubo et al developed the most comprehensive modeling of this phenomena including all the above-mentioned features plus a different photo-ionization source calculation method, the solution of the Boltzmann equation, and an extensive chemical kinetics model for two-dimensional transient simulations. To the knowledge of the present authors the most engine-oriented study of the Corona discharge process is that of [14] Varma et al In [14], the authors implemented a code for the electrical characterization of a HFI system by solving the Gauss' law with several simplificative hypothesis among which the most stringent ones are: (i) The ionization layer and its effects on radicals and ions production are neglected; (ii) the conductivity of the medium in set to zero; (iii) the mobility of the ions does not change; and (iv) the medium is represented by a single species. The code was tested on engine-like gas conditions assumed to reproduce the ones of a typical natural aspirated Spark Ignited (SI) engine.…”

Section: Introductionmentioning

confidence: 99%

“…As a result, the radicals mapping around the corona tip is obtained. Differently from Varma et al [14] which focused their study on the characterization of the HFI device and the Corona effect only from the electrical aspect point of view, the present work aims to reproduce the volume extension and the gas composition available for combustion triggered by the Corona discharge event. Moreover it needs to be considered that the implementations of Varma et al were addressed by naturally aspirated engine conditions, which are no more consistent with the current marketplace scenario.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

et al. 2021

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Therefore, in order to run engine operations richer in EGR while ensuring combustion stability and repeatability, the use of supporting device is compulsory. In this framework, the equipment of the engine with High Frequency Ignition (HFI) spark devices based on the so-called Corona discharge Energies 2022, 15, 1426 2 of 19 effect [5,6] has proven to be a powerful solution to boost combustion stability and velocity. In [7], Pienda et al compared classical and Corona spark devices in a research engine implementing a wide Design Of Experiments (DOE).…”

Section: Introductionmentioning

confidence: 99%

“…•(D e ∇(n e )) + ∇•(n e µ e E) + β ep n p n e − S ph = −(α − β) n e µ e E (5) ∇• n p µ p E + β ep n p n e = αn e µ e E + S ph(6) …”

unclassified

Numerical Evaluation of the Effect of Fuel Blending with CO2 and H2 on the Very Early Corona-Discharge Behavior in Spark Ignited Engines

Mariani

Civita

Pulga³

et al. 2022

Energies

View full text Add to dashboard Cite

Reducing green-house gases emission from light-duty vehicles is compulsory in order to slow down the climate change. The application of High Frequency Ignition systems based on the Corona discharge effect has shown the potential to extend the dilution limit of engine operating conditions promoting lower temperatures and faster combustion events, thus, higher thermal and indicating efficiency. Furthermore, predicting the behavior of Corona ignition devices against new sustainable fuel blends, including renewable hydrogen and biogas, is crucial in order to deal with the short-intermediate term fleet electric transition. The numerical evaluation of Corona-induced discharge radius and radical species under those conditions can be helpful in order to capture local effects that could be reached only with complex and expensive optical investigations. Using an extended version of the Corona one-dimensional code previously published by the present authors, the simulation of pure methane and different methane–hydrogen blends, and biogas–hydrogen blends mixed with air was performed. Each mixture was simulated both for 10% recirculated exhaust gas dilution and for its corresponding dilute upper limit, which was estimated by means of chemical kinetics simulations integrated with a custom misfire detection criterion.

show abstract

Modeling of thermal and kinetic processes in non-equilibrium plasma ignition applied to a lean combustion engine

Zembi

Cruccolini

Mariani

et al. 2021

Applied Thermal Engineering

View full text Add to dashboard Cite

Simulation, Design and Development of a High Frequency Corona Discharge Ignition System

Cited by 8 publications

References 3 publications

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

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

Numerical Evaluation of the Effect of Fuel Blending with CO2 and H2 on the Very Early Corona-Discharge Behavior in Spark Ignited Engines

Modeling of thermal and kinetic processes in non-equilibrium plasma ignition applied to a lean combustion engine

Contact Info

Product

Resources

About