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Influence of plasma-assisted ignition on flame propagation and performance in a spark-ignition engine

Hwang, Joonsik; Kim, Wooyeong; Bae, Choongsik

Abstract (englisch):

Lean-burn is an attractive concept for reasons of high thermal efficiency and low nitrogen oxide (NOx) emissions, however, successful implementation in spark-ignition (SI) engines turned out to be challenging because of misfire or partial burn caused by attenuated flame propagation. In order to overcome this issue, microwave-assisted plasma ignition system (MAPIS) has been applied in combustion systems. The MAPIS consists of a conventional ignition coil, a non-resistor spark plug, a mixing unit, a waveguide, and a magnetron (2.45GHz, 3kW). A series of experiments was carried out to understand discharge characteristics and to validate its performance in a constant volume vessel as well as in a single-cylinder spark-ignition engine. The fundamental investigation based on optical emission spectroscopy and flame imaging showed that the ejection of the microwave was beneficial to produce more reactive species such as OH and O radicals thanks to higher electron temperature than conventional spark ignition. The lean limit was able to be extended up to an equivalence ratio of 0.5 based on a larger initial flame
kernel size with MAPIS in the vessel test. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000149339
Veröffentlicht am 02.08.2022
Originalveröffentlichung
DOI: 10.1016/j.jaecs.2021.100029
Scopus
Zitationen: 14
Dimensions
Zitationen: 14
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Kolbenmaschinen (IFKM)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 06.2021
Sprache Englisch
Identifikator ISSN: 2666-352X
KITopen-ID: 1000149339
Erschienen in Applications in Energy and Combustion Science
Verlag Elsevier B.V.
Band 6
Seiten Art.-Nr.: 100029
Vorab online veröffentlicht am 07.05.2021
Nachgewiesen in Dimensions
Scopus
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