Energy characterization of an innovative non-equilibrium plasma ignition system based on the dielectric barrier discharge via pressure-rise calorimetry

Ricci, Federico; Discepoli, Gabriele; Cruccolini, Valentino; Petrucci, Luca; Papi, Stefano; Giuseppe, Alessia Di; Grimaldi, Carlo N.

doi:10.1016/j.enconman.2021.114458

Cited by 17 publications

(7 citation statements)

References 37 publications

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“…For 12 kV, it becomes double (63 %) that of the first case. These results prove that the DBD plasma is more energetic at a higher voltage than at low voltages, and therefore it produces more modifications in the surface characteristics of the particle [15,16]. The increase of the plasma exposure time increase the energy delivered to the polymer sample by introducing more polar groups which increase the surface sample wettability.…”

Section: Resultsmentioning

confidence: 59%

Surface electric charge decay behavior of Polypropylene (PP) films treated by atmospheric air dielectric barrier discharge

Labiod

Ziari²,

Bousbaa³

et al. 2023

J. Phys.: Conf. Ser.

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Atmospheric air dielectric barrier discharge (DBD) is one of the most effective physical techniques for the cold plasma source. It is a promising technique used to modify the surface properties of polymers. This modification leads to improving wetting and adhesion properties, a change in surface roughness and other significant technological features. In recent studies, researchers have showed that DBD plasma exposure can modify the electric properties of insulating materials. In this study, we focused our attention on the influence of DBD plasma treatment on the surface electric charge behavior in polypropylene (PP) thin films. The effect of DBD plasma has been studied as a function of treatment time for two values of applied discharge voltages; 7 and 12 kV. After being exposed to DBD plasma, the samples were charged for 5 seconds in ambient air using a negative triode corona electrode system. The influence of DBD plasma treatment on the surface electric charge behaviour in PP thin films was investigated. The surface characterization of the untreated and treated PP films is performed using surface electric charge decay measurements, for identical charging conditions.

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Section: Resultsmentioning

confidence: 59%

Surface electric charge decay behavior of Polypropylene (PP) films treated by atmospheric air dielectric barrier discharge

Labiod

Ziari²,

Bousbaa³

et al. 2023

J. Phys.: Conf. Ser.

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“…This behavior indicates that the primary influence is thermal, while the presence of radicals plays a secondary role, particularly under lean conditions with advanced ignition timing. These findings suggest that BDI primarily extends the stable operating limit through its high amount of energy release into the medium compared to spark [38], in conjunction with the volumetric characteristics of its discharge which can involve a larger portion of the combustion chamber with respect to traditional thermal ignition [34]. However, when operating with methanol, BDI is capable of extending the engine stable limit to be extended up to λ = 2.0, resulting in 0.2 λ units gain over the E5-BDI and in 0.3 λ units gain over the M100-spark.…”

Section: Combustion Durationmentioning

confidence: 84%

“…At each operating point tested, 100 consecutive events are recorded. The innovative igniter employed in this work, i.e., the Barrier Discharge Igniter (BDI) [38], is controlled by a dedicated power electronic system (ACIS Box) at 1.04 MHz and its discharge control parameters, i.e., activation time t on and the driving voltage V d are managed by a dedicated software [39,40]. The first control parameter, i.e., t on , defines the discharge duration, while the second one, i.e., V d , is proportional to the electrode voltage occurring on the igniter firing end and regulates the development of ionization waves, i.e., streamers, around the igniter's dielectric alumina globe [33].…”

Section: Methodsmentioning

confidence: 99%

The Synergy between Methanol M100 and Plasma-Assisted Ignition System PAI to Achieve Increasingly Leaner Mixtures in a Single-Cylinder Engine

Ricci,

Mariani,

Papi

et al. 2024

Energies

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Currently, conventional spark–ignition engines face challenges in meeting the ever-growing demands of customers and increasingly stringent regulations regarding pollutant emissions. A combination of innovative strategies and carbon-neutral fuels is deemed necessary in order to further reduce fuel consumption and minimize engine emissions. The present work aims to assess the performance of combustion strategies using low-carbon-content fuel, such as methanol M100, ignited by a plasma-assisted igniter (PAI) under ultra-lean conditions. The experimental campaign is conducted on a single-cylinder research engine at 1000 rpm and low loads, moving up to the engine lean stable limits. The specific purpose of this work is to determine the benefits brought by the proposed strategy, referred to as M100–PAI, which compared market gasoline E5 ignited by the PAI system and conventional spark. The synergy between M100 (methanol) and Plasma-Assisted Ignition (PAI) in internal combustion engines yielded notable benefits. This combination significantly improved combustion stability if compared to the other combinations tested, by extending the lean stable limit to λ = 2.0, reducing cycle-to-cycle variability, and facilitating faster flame front acceleration, resulting in enhanced homogeneity. These enhancements, obtained with the combination M100–PAI, contributed to higher fuel efficiency, showing a 10% efficiency gain over the combination E5–gasoline spark ignition. The findings highlight the potential of innovative combustion strategies using low-carbon fuels and advanced ignition systems to meet stringent emissions regulations while improving engine performance.

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“…The experimental campaign is developed by using a radio-frequency (RF) advanced corona ignition system, i.e., the Barrier Discharge Igniter (BDI), provided by Federal Mogul Powertrain, a Tenneco group company [47][48][49] (Figure 3). The igniter generates ionization waves called streamers that start the combustion process using thermal, kinetic, and transport effects [50,51].…”

Section: Ignitermentioning

confidence: 99%

Detecting the Flame Front Evolution in Spark-Ignition Engine under Lean Condition Using the Mask R-CNN Approach

et al. 2022

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In the wake of previous works, the authors propose a new approach for the identification and evolution of the flame front in an optical SI engine. Currently, it is an essential prerogative to characterize the capability of innovative igniters to guarantee earlier flame development in critical operating conditions, such as ultra-lean mixture, towards which automotive research is moving to deal with the ever more stringent regulations on pollutant emissions. The core of the new approach lies in the R-CNN Mask method. The latter consists of a conceptually simple and general framework for object instance segmentation. It can efficiently detect objects contained in an image while simultaneously generating a high-quality segmentation mask for each instance. In particular, the aim this work is to develop an automatized algorithm for detecting, as objectively as possible, the flame front evolution of lean/ultra-lean mixtures ignited by low-temperature plasma-based ignition systems. The capability of the Mask R-CNN algorithm to automatically estimate the binarized area, without setting a defined binarized threshold, allows us to perform an analysis of the flame front evolution completely independent from the user interpretation. Mask R-CNN can detect the kernel in advance and can identify events as regular combustions instead of misfires or anomalies if compared to other traditional approaches. These features make the proposed method the most suitable option to analysis the real behavior of the innovative ignition systems at critical operating conditions.

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Energy characterization of an innovative non-equilibrium plasma ignition system based on the dielectric barrier discharge via pressure-rise calorimetry

Cited by 17 publications

References 37 publications

Surface electric charge decay behavior of Polypropylene (PP) films treated by atmospheric air dielectric barrier discharge

Surface electric charge decay behavior of Polypropylene (PP) films treated by atmospheric air dielectric barrier discharge

The Synergy between Methanol M100 and Plasma-Assisted Ignition System PAI to Achieve Increasingly Leaner Mixtures in a Single-Cylinder Engine

Detecting the Flame Front Evolution in Spark-Ignition Engine under Lean Condition Using the Mask R-CNN Approach

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