Effect of Temperature, Pressure and Equivalence Ratio on Ignition Delay in Ignition Quality Tester (IQT): Diesel,n-Heptane, andiso-Octane Fuels under Low Temperature Conditions

Handle URI:
http://hdl.handle.net/10754/627250
Title:
Effect of Temperature, Pressure and Equivalence Ratio on Ignition Delay in Ignition Quality Tester (IQT): Diesel,n-Heptane, andiso-Octane Fuels under Low Temperature Conditions
Authors:
Yang, Seung Yeon ( 0000-0003-4512-8713 ) ; Naser, Nimal ( 0000-0002-2740-2179 ) ; Chung, Suk-Ho ( 0000-0001-8782-312X ) ; Cha, Junepyo
Abstract:
Effects of temperature, pressure and global equivalence ratio on total ignition delay time in a constant volume spray combustion chamber were investigated for diesel fuel along with the primary reference fuels (PRFs) of n-heptane and iso-octane in relatively low temperature conditions to simulate unsteady spray ignition behavior. A KAUST Research ignition quality tester (KR-IQT) was utilized, which has a feature of varying temperature, pressure and equivalence ratio using a variable displacement fuel pump. A gradient method was adopted in determining the start of ignition in order to compensate pressure increase induced by low temperature heat release. Comparison of this method with other existing methods was discussed. Ignition delay times were measured at various equivalence ratios (0.5-1.7) with the temperatures of initial charge air in the range from 698 to 860 K and the pressures in the range of 1.5 to 2.1 MPa, pertinent to low temperature combustion (LTC) conditions. An attempt to scale the effect of pressure on total ignition delay was undertaken and the equivalence ratio exponent and activation energy in the Arrhenius expression of total ignition delay were determined. Ignition delay results indicated that there were strong correlations of pressure, temperature, and equivalence ratio under most conditions studied except at relatively low pressures. Diesel (DCN 52.5) and n-heptane (DCN 54) fuels exhibited reasonably similar ignition delay characteristics, while iso-octane showed a distinct behavior under low temperature regime having a two-stage ignition, which substantiate the adoption of the gradient method in determining ignition delay.
KAUST Department:
Clean Combustion Research Center; Physical Sciences and Engineering (PSE) Division; Mechanical Engineering Program; King Abdullah Univ of Science & Tech, Saudi Arabia
Citation:
Yang SY, Naser N, Chung SH, Cha J (2015) Effect of Temperature, Pressure and Equivalence Ratio on Ignition Delay in Ignition Quality Tester (IQT): Diesel,n-Heptane, andiso-Octane Fuels under Low Temperature Conditions. SAE International Journal of Fuels and Lubricants 8: 537–548. Available: http://dx.doi.org/10.4271/2015-01-9074.
Publisher:
SAE International
Journal:
SAE International Journal of Fuels and Lubricants
Issue Date:
2-Nov-2015
DOI:
10.4271/2015-01-9074
Type:
Article
ISSN:
1946-3960
Sponsors:
This paper was supported by Saudi Aramco FUELCOM Program and Clean Combustion Research Center, King Abdullah University of Science and Technology.
Additional Links:
https://saemobilus.sae.org/content/2015-01-9074
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.authorYang, Seung Yeonen
dc.contributor.authorNaser, Nimalen
dc.contributor.authorChung, Suk-Hoen
dc.contributor.authorCha, Junepyoen
dc.date.accessioned2018-03-11T06:54:11Z-
dc.date.available2018-03-11T06:54:11Z-
dc.date.issued2015-11-02en
dc.identifier.citationYang SY, Naser N, Chung SH, Cha J (2015) Effect of Temperature, Pressure and Equivalence Ratio on Ignition Delay in Ignition Quality Tester (IQT): Diesel,n-Heptane, andiso-Octane Fuels under Low Temperature Conditions. SAE International Journal of Fuels and Lubricants 8: 537–548. Available: http://dx.doi.org/10.4271/2015-01-9074.en
dc.identifier.issn1946-3960en
dc.identifier.doi10.4271/2015-01-9074en
dc.identifier.urihttp://hdl.handle.net/10754/627250-
dc.description.abstractEffects of temperature, pressure and global equivalence ratio on total ignition delay time in a constant volume spray combustion chamber were investigated for diesel fuel along with the primary reference fuels (PRFs) of n-heptane and iso-octane in relatively low temperature conditions to simulate unsteady spray ignition behavior. A KAUST Research ignition quality tester (KR-IQT) was utilized, which has a feature of varying temperature, pressure and equivalence ratio using a variable displacement fuel pump. A gradient method was adopted in determining the start of ignition in order to compensate pressure increase induced by low temperature heat release. Comparison of this method with other existing methods was discussed. Ignition delay times were measured at various equivalence ratios (0.5-1.7) with the temperatures of initial charge air in the range from 698 to 860 K and the pressures in the range of 1.5 to 2.1 MPa, pertinent to low temperature combustion (LTC) conditions. An attempt to scale the effect of pressure on total ignition delay was undertaken and the equivalence ratio exponent and activation energy in the Arrhenius expression of total ignition delay were determined. Ignition delay results indicated that there were strong correlations of pressure, temperature, and equivalence ratio under most conditions studied except at relatively low pressures. Diesel (DCN 52.5) and n-heptane (DCN 54) fuels exhibited reasonably similar ignition delay characteristics, while iso-octane showed a distinct behavior under low temperature regime having a two-stage ignition, which substantiate the adoption of the gradient method in determining ignition delay.en
dc.description.sponsorshipThis paper was supported by Saudi Aramco FUELCOM Program and Clean Combustion Research Center, King Abdullah University of Science and Technology.en
dc.publisherSAE Internationalen
dc.relation.urlhttps://saemobilus.sae.org/content/2015-01-9074en
dc.titleEffect of Temperature, Pressure and Equivalence Ratio on Ignition Delay in Ignition Quality Tester (IQT): Diesel,n-Heptane, andiso-Octane Fuels under Low Temperature Conditionsen
dc.typeArticleen
dc.contributor.departmentClean Combustion Research Centeren
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentMechanical Engineering Programen
dc.contributor.departmentKing Abdullah Univ of Science & Tech, Saudi Arabiaen
dc.identifier.journalSAE International Journal of Fuels and Lubricantsen
dc.contributor.institutionKorea National Univ of Transportation, South Koreaen
kaust.authorYang, Seung Yeonen
kaust.authorNaser, Nimalen
kaust.authorChung, Suk-Hoen
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