Naphtha vs. dieseline – The effect of fuel properties on combustion homogeneity in transition from CI combustion towards HCCI

Handle URI:
http://hdl.handle.net/10754/627458
Title:
Naphtha vs. dieseline – The effect of fuel properties on combustion homogeneity in transition from CI combustion towards HCCI
Authors:
Vallinayagam, R.; An, Yanzhao ( 0000-0002-5318-1170 ) ; S.Vedharaj; Sim, Jaeheon ( 0000-0003-1441-7344 ) ; Chang, Junseok; Johansson, Bengt ( 0000-0002-0163-5062 )
Abstract:
The scope of this research study pertains to compare the combustion and emission behavior between naphtha and dieseline at different combustion modes. In this study, US dieseline (50% US diesel + 50% RON 91 gasoline) and EU dieseline (45% EU diesel + 55% RON 97 gasoline) with derived cetane number (DCN) of 36 are selected for experimentation in an optical engine. Besides naphtha and dieseline, PRF60 is also tested as a surrogate fuel for naphtha. For the reported fuel with same RON = 60, the effect of physical properties on combustion homogeneity when moving from homogenized charge compression ignition (HCCI) to compression ignition (CI) combustion is studied.The combustion phasing of naphtha at an intake air temperature of 95 °C is taken as the baseline data. The engine experimental results show that higher and lower intake air temperature is required for dieseline mixtures to have same combustion phasing as that of naphtha at HCCI and CI conditions due to the difference in the physical properties. Especially at HCCI mode, due to wider distillation range of dieseline, the evaporation of the fuel is affected so that the gas phase mixture becomes too lean to auto-ignite. However, at partially premixed combustion (PPC) conditions, all test fuels required almost same intake air temperature to match up with the combustion phasing of baseline naphtha. From the rate of heat release and combustion images, it was found that naphtha and PRF60 showed improved premixed combustion when compared dieseline mixtures. The stratification analysis shows that combustion is more stratified for dieseline whereas it is premixed for naphtha and PRF60. The level of stratification linked with soot emission showed that soot concentration is higher at stratified CI combustion whereas near zero soot emissions were noted at PPC mode.
KAUST Department:
Clean Combustion Research Center; Physical Sciences and Engineering (PSE) Division; Mechanical Engineering Program
Citation:
Vallinayagam R, An Y, S.Vedharaj, Sim J, Chang J, et al. (2018) Naphtha vs. dieseline – The effect of fuel properties on combustion homogeneity in transition from CI combustion towards HCCI. Fuel 224: 451–460. Available: http://dx.doi.org/10.1016/j.fuel.2018.03.123.
Publisher:
Elsevier BV
Journal:
Fuel
Issue Date:
20-Mar-2018
DOI:
10.1016/j.fuel.2018.03.123
Type:
Article
ISSN:
0016-2361
Additional Links:
http://www.sciencedirect.com/science/article/pii/S0016236118305313
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Mechanical Engineering Program; Clean Combustion Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorVallinayagam, R.en
dc.contributor.authorAn, Yanzhaoen
dc.contributor.authorS.Vedharajen
dc.contributor.authorSim, Jaeheonen
dc.contributor.authorChang, Junseoken
dc.contributor.authorJohansson, Bengten
dc.date.accessioned2018-04-15T07:13:35Z-
dc.date.available2018-04-15T07:13:35Z-
dc.date.issued2018-03-20en
dc.identifier.citationVallinayagam R, An Y, S.Vedharaj, Sim J, Chang J, et al. (2018) Naphtha vs. dieseline – The effect of fuel properties on combustion homogeneity in transition from CI combustion towards HCCI. Fuel 224: 451–460. Available: http://dx.doi.org/10.1016/j.fuel.2018.03.123.en
dc.identifier.issn0016-2361en
dc.identifier.doi10.1016/j.fuel.2018.03.123en
dc.identifier.urihttp://hdl.handle.net/10754/627458-
dc.description.abstractThe scope of this research study pertains to compare the combustion and emission behavior between naphtha and dieseline at different combustion modes. In this study, US dieseline (50% US diesel + 50% RON 91 gasoline) and EU dieseline (45% EU diesel + 55% RON 97 gasoline) with derived cetane number (DCN) of 36 are selected for experimentation in an optical engine. Besides naphtha and dieseline, PRF60 is also tested as a surrogate fuel for naphtha. For the reported fuel with same RON = 60, the effect of physical properties on combustion homogeneity when moving from homogenized charge compression ignition (HCCI) to compression ignition (CI) combustion is studied.The combustion phasing of naphtha at an intake air temperature of 95 °C is taken as the baseline data. The engine experimental results show that higher and lower intake air temperature is required for dieseline mixtures to have same combustion phasing as that of naphtha at HCCI and CI conditions due to the difference in the physical properties. Especially at HCCI mode, due to wider distillation range of dieseline, the evaporation of the fuel is affected so that the gas phase mixture becomes too lean to auto-ignite. However, at partially premixed combustion (PPC) conditions, all test fuels required almost same intake air temperature to match up with the combustion phasing of baseline naphtha. From the rate of heat release and combustion images, it was found that naphtha and PRF60 showed improved premixed combustion when compared dieseline mixtures. The stratification analysis shows that combustion is more stratified for dieseline whereas it is premixed for naphtha and PRF60. The level of stratification linked with soot emission showed that soot concentration is higher at stratified CI combustion whereas near zero soot emissions were noted at PPC mode.en
dc.publisherElsevier BVen
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S0016236118305313en
dc.subjectNaphthaen
dc.subjectDieselineen
dc.subjectCombustion homogeneityen
dc.subjectDiesel engine and stratificationen
dc.titleNaphtha vs. dieseline – The effect of fuel properties on combustion homogeneity in transition from CI combustion towards HCCIen
dc.typeArticleen
dc.contributor.departmentClean Combustion Research Centeren
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentMechanical Engineering Programen
dc.identifier.journalFuelen
kaust.authorVallinayagam, R.en
kaust.authorAn, Yanzhaoen
kaust.authorS.Vedharajen
kaust.authorSim, Jaeheonen
kaust.authorChang, Junseoken
kaust.authorJohansson, Bengten
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