Combustion Homogeneity and Emission Analysis during the Transition from CI to HCCI for FACE I Gasoline

Handle URI:
http://hdl.handle.net/10754/626783
Title:
Combustion Homogeneity and Emission Analysis during the Transition from CI to HCCI for FACE I Gasoline
Authors:
Vedharaj, S.; Vallinayagam, R; An, Yanzhao; Izadi Najafabadi, Mohammad; Somers, Bart; Chang, Junseok; Johansson, Bengt ( 0000-0002-0163-5062 )
Abstract:
Low temperature combustion concepts are studied recently to simultaneously reduce NOX and soot emissions. Optical studies are performed to study gasoline PPC in CI engines to investigate in-cylinder combustion and stratification. It is imperative to perform emission measurements and interpret the results with combustion images. In this work, we attempt to investigate this during the transition from CI to HCCI mode for FACE I gasoline (RON = 70) and its surrogate, PRF70. The experiments are performed in a single cylinder optical engine that runs at a speed of 1200 rpm. Considering the safety of engine, testing was done at lower IMEP (3 bar) and combustion is visualized using a high-speed camera through a window in the bottom of the bowl. From the engine experiments, it is clear that intake air temperature requirement is different at various combustion modes to maintain the same combustion phasing. While a fixed intake air temperature is required at HCCI condition, it varies at PPC and CI conditions between FACE I gasoline and PRF70. Three zones are identified 1) SOI = -180 to -80 CAD (aTDC) is HCCI zone 2) SOI = -40 to -20 CAD (aTDC) is PPC zone 3) After SOI = -15 CAD (aTDC) is CI zone. Combustion duration, ignition delay, start of combustion and CA90 (crank angle at which 90% of fuel burnt) are comparable between FACE I gasoline and PRF70. The combustion images show a prominent soot flame at CI condition, while only blue coloured premixed flames are visible at PPC condition for both the fuels. PRF70 seems to have a pronounced premixed effect when compared to FACE I gasoline at early injections, showing a decreased level of stratification. NOX emission and soot concentration decreases from CI condition and attains a constant zero value at HCCI condition for both FACE I gasoline and PRF70. CO and CO2 emissions matches between FACE I gasoline and PRF70 at PPC and CI condition, while CO emission is lower for PRF70 at HCCI condition.
KAUST Department:
Clean Combustion Research Center; Physical Sciences and Engineering (PSE) Division; Mechanical Engineering Program
Citation:
Vedharaj S, Vallinayagam R, An Y, Izadi Najafabadi M, Somers B, et al. (2017) Combustion Homogeneity and Emission Analysis during the Transition from CI to HCCI for FACE I Gasoline. SAE Technical Paper Series. Available: http://dx.doi.org/10.4271/2017-01-2263.
Publisher:
SAE International
Journal:
SAE Technical Paper Series
Conference/Event name:
SAE 2017 International Powertrains, Fuels and Lubricants Meeting, FFL 2017
Issue Date:
10-Oct-2017
DOI:
10.4271/2017-01-2263
Type:
Conference Paper
Sponsors:
This work was funded by competitive research funding from King Abdullah University of Science and Technology (KAUST) under the Clean Combustion Research Center’s research program. We also acknowledge funding from Saudi Aramco under FUELCOM program. Finally, we would like to express our gratitude to our research technician, Adrian. I. Ichim for his support in carrying out the experiments at KAUST engine lab.
Additional Links:
https://saemobilus.sae.org/content/2017-01-2263
Appears in Collections:
Conference Papers; Physical Sciences and Engineering (PSE) Division; Mechanical Engineering Program; Clean Combustion Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorVedharaj, S.en
dc.contributor.authorVallinayagam, Ren
dc.contributor.authorAn, Yanzhaoen
dc.contributor.authorIzadi Najafabadi, Mohammaden
dc.contributor.authorSomers, Barten
dc.contributor.authorChang, Junseoken
dc.contributor.authorJohansson, Bengten
dc.date.accessioned2018-01-15T06:35:09Z-
dc.date.available2018-01-15T06:35:09Z-
dc.date.issued2017-10-10en
dc.identifier.citationVedharaj S, Vallinayagam R, An Y, Izadi Najafabadi M, Somers B, et al. (2017) Combustion Homogeneity and Emission Analysis during the Transition from CI to HCCI for FACE I Gasoline. SAE Technical Paper Series. Available: http://dx.doi.org/10.4271/2017-01-2263.en
dc.identifier.doi10.4271/2017-01-2263en
dc.identifier.urihttp://hdl.handle.net/10754/626783-
dc.description.abstractLow temperature combustion concepts are studied recently to simultaneously reduce NOX and soot emissions. Optical studies are performed to study gasoline PPC in CI engines to investigate in-cylinder combustion and stratification. It is imperative to perform emission measurements and interpret the results with combustion images. In this work, we attempt to investigate this during the transition from CI to HCCI mode for FACE I gasoline (RON = 70) and its surrogate, PRF70. The experiments are performed in a single cylinder optical engine that runs at a speed of 1200 rpm. Considering the safety of engine, testing was done at lower IMEP (3 bar) and combustion is visualized using a high-speed camera through a window in the bottom of the bowl. From the engine experiments, it is clear that intake air temperature requirement is different at various combustion modes to maintain the same combustion phasing. While a fixed intake air temperature is required at HCCI condition, it varies at PPC and CI conditions between FACE I gasoline and PRF70. Three zones are identified 1) SOI = -180 to -80 CAD (aTDC) is HCCI zone 2) SOI = -40 to -20 CAD (aTDC) is PPC zone 3) After SOI = -15 CAD (aTDC) is CI zone. Combustion duration, ignition delay, start of combustion and CA90 (crank angle at which 90% of fuel burnt) are comparable between FACE I gasoline and PRF70. The combustion images show a prominent soot flame at CI condition, while only blue coloured premixed flames are visible at PPC condition for both the fuels. PRF70 seems to have a pronounced premixed effect when compared to FACE I gasoline at early injections, showing a decreased level of stratification. NOX emission and soot concentration decreases from CI condition and attains a constant zero value at HCCI condition for both FACE I gasoline and PRF70. CO and CO2 emissions matches between FACE I gasoline and PRF70 at PPC and CI condition, while CO emission is lower for PRF70 at HCCI condition.en
dc.description.sponsorshipThis work was funded by competitive research funding from King Abdullah University of Science and Technology (KAUST) under the Clean Combustion Research Center’s research program. We also acknowledge funding from Saudi Aramco under FUELCOM program. Finally, we would like to express our gratitude to our research technician, Adrian. I. Ichim for his support in carrying out the experiments at KAUST engine lab.en
dc.publisherSAE Internationalen
dc.relation.urlhttps://saemobilus.sae.org/content/2017-01-2263en
dc.subjectCombustion homogeneityen
dc.subjectStratificationen
dc.subjectPPCen
dc.subjectFACE gasolineen
dc.subjectPRF70en
dc.subjectoptical engineen
dc.titleCombustion Homogeneity and Emission Analysis during the Transition from CI to HCCI for FACE I Gasolineen
dc.typeConference Paperen
dc.contributor.departmentClean Combustion Research Centeren
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentMechanical Engineering Programen
dc.identifier.journalSAE Technical Paper Seriesen
dc.conference.date2017-10-15 to 2017-10-19en
dc.conference.nameSAE 2017 International Powertrains, Fuels and Lubricants Meeting, FFL 2017en
dc.conference.locationBeijing, CHNen
dc.contributor.institutionTechnische Universiteit Eindhovenen
dc.contributor.institutionEindhoven University Of Technologyen
dc.contributor.institutionSaudi Aramcoen
kaust.authorVedharaj, S.en
kaust.authorVallinayagam, Ren
kaust.authorAn, Yanzhaoen
kaust.authorJohansson, Bengten
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.