2022
DOI: 10.3390/vehicles4010010
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A Development of a New Image Analysis Technique for Detecting the Flame Front Evolution in Spark Ignition Engine under Lean Condition

Abstract: The aim of herein 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 low luminosity characterizing the latter conditions makes both kernel formation and combustion development difficult to detect accurately. Therefore, to estimate the igniter capability to efficiently ignite the mixture, ever more performing tools are required. The present work proposes a new i… Show more

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Cited by 11 publications
(8 citation statements)
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“…This quality is an essential prerogative for characterizing the ACIS igniters' ability to guarantee earlier flame development. At λ = 1.5, considering the higher values of luminosity [22], no appreciable differences are found between the compared approaches. With slight underestimations, both algorithms prove to be capable of reproducing the Target trend, especially after the R eq = 20 mm.…”
Section: Resultsmentioning
confidence: 81%
See 2 more Smart Citations
“…This quality is an essential prerogative for characterizing the ACIS igniters' ability to guarantee earlier flame development. At λ = 1.5, considering the higher values of luminosity [22], no appreciable differences are found between the compared approaches. With slight underestimations, both algorithms prove to be capable of reproducing the Target trend, especially after the R eq = 20 mm.…”
Section: Resultsmentioning
confidence: 81%
“…Once the choice has been made, the method is applied to all the combustions analyzed. At ultra-lean conditions, where the brightness is very low, the instant of kernel formation can be demanding to identify [22] (Figure A1). Different operators could produce quite different results; therefore, these results are of questionable value.…”
Section: Base Referencementioning
confidence: 99%
See 1 more Smart Citation
“…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]. The firing end contains the counter electrode, and it prevents the streamer-to-arc transition phenomenon which causes the loss of all benefits brought by the non-thermal plasma discharge [41,42] (Figure 1).…”
Section: Methodsmentioning
confidence: 99%
“…The recognition of the flame evolution is carried out by PA, regardless of any user's decision, which could make the proposed method potentially suitable for any type of application requiring a high degree of objectivity. The new algorithm, applied to simplified but realistic images, shows promising results [65,66].…”
Section: Activation Time Sweepmentioning
confidence: 96%