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dc.contributor.authorEcheverri Marquez, Manuel Alejandro
dc.contributor.authorHlaing, Ponnya
dc.contributor.authorBen Houidi, Moez
dc.contributor.authorMagnotti, Gaetano
dc.contributor.authorJohansson, Bengt
dc.contributor.authorCenker, Emre
dc.date.accessioned2021-06-09T06:32:33Z
dc.date.available2021-06-09T06:32:33Z
dc.date.issued2021-04-06
dc.identifier.citationEcheverri Marquez, M., Hlaing, P., Ben Houidi, M., Magnotti, G., Johansson, B., & Cenker, E. (2021). Optical Diagnostics of Pre-Chamber Combustion with Flat and Bowl-In Piston Combustion Chamber. SAE Technical Paper Series. doi:10.4271/2021-01-0528
dc.identifier.issn0148-7191
dc.identifier.doi10.4271/2021-01-0528
dc.identifier.urihttp://hdl.handle.net/10754/669470
dc.description.abstractPre-chamber Combustion (PCC) extends the lean operation limit operation of spark ignition (SI) engines, thus it has been of interest for researchers as a pathway for increased efficiency and reduced emissions. Optical diagnostic techniques are essential to understand the combustion process, but the engine components such as the piston geometry, are often different from real engines to maximize the optical access. In this study, ignition and subsequent main chamber combustion are compared in an optically accessible PCC engine equipped with a “flat” and a real engine-like “bowl” piston geometry. An active fueled narrow throat pre-chamber was used as the ignition source of the charge in the main-chamber, and both chambers were fueled with methane. Three pre-chamber fuel effective mean pressure (FuelMEP) ratios (PCFR) namely 6%, 9% and 11% of the total amount of fuel were tested at two global excess air ratios (λ) at values of 1.8 and 2.0. The optical engine configuration included a metal liner and a quartz piston, and it was operated for 100 consecutive firing cycles, allowing stable emissions measurements. A high-speed intensified camera was used to record the OH* chemiluminescence of the main-chamber combustion. The camera was operated at 50 kHz, resulting in a resolution smaller than 0.2 Crank Angle Degree (CAD), at the engine speed of 1200 revolutions per minute (RPM). Both pistons exhibited similar pre-chamber pressures and an equal pressure difference between pre- and main-chamber (ΔP) at the peak pressure inside the pre-chamber. The free reacting jet behavior was also comparable between the two piston geometries. However, the flat combustion chamber resulted in a shorter free jet time because of the early reacting jet-piston interaction. The interaction also slowed down the combustion propagation and increased the combustion duration for the flat piston.
dc.description.sponsorshipThe paper is based upon work supported by Saudi Aramco Research and Development Center FUELCOM3 program under Master Research Agreement Number 6600024505/01. FUELCOM (Fuel Combustion for Advanced Engines) is a collaborative research undertaking between Saudi Aramco and KAUST intended to address the fundamental aspects of hydrocarbon fuel combustion in engines and develop fuel/engine design tools suitable for advanced combustion modes.
dc.publisherSAE International
dc.relation.urlhttps://www.sae.org/content/2021-01-0528/
dc.rightsArchived with thanks to SAE International
dc.titleOptical Diagnostics of Pre-Chamber Combustion with Flat and Bowl-In Piston Combustion Chamber
dc.typeConference Paper
dc.contributor.departmentMechanical Engineering
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentMechanical Engineering Program
dc.contributor.departmentClean Combustion Research Center
dc.rights.embargodate2021-10-06
dc.conference.date2021-04-13 to 2021-04-15
dc.conference.nameSAE 2021 WCX Digital Summit
dc.conference.locationVirtual, Online, USA
dc.eprint.versionPost-print
dc.contributor.institutionSaudi Aramco
dc.identifier.issue2021
kaust.personEcheverri Marquez, Manuel Alejandro
kaust.personHlaing, Ponnya
kaust.personBen Houidi, Moez
kaust.personMagnotti, Gaetano
kaust.personJohansson, Bengt
dc.identifier.eid2-s2.0-85106980897


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