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dc.contributor.authorYang, Seung Yeon
dc.contributor.authorNaser, Nimal
dc.contributor.authorChung, Suk Ho
dc.contributor.authorCha, Junepyo
dc.date.accessioned2018-03-11T06:54:11Z
dc.date.available2018-03-11T06:54:11Z
dc.date.issued2015-11-01
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.
dc.identifier.issn1946-3960
dc.identifier.doi10.4271/2015-01-9074
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.
dc.description.sponsorshipThis paper was supported by Saudi Aramco FUELCOM Program and Clean Combustion Research Center, King Abdullah University of Science and Technology.
dc.publisherSAE International
dc.relation.urlhttps://saemobilus.sae.org/content/2015-01-9074
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 Conditions
dc.typeArticle
dc.contributor.departmentClean Combustion Research Center
dc.contributor.departmentCombustion and Laser Diagnostics Laboratory
dc.contributor.departmentMechanical Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalSAE International Journal of Fuels and Lubricants
dc.contributor.institutionKorea National Univ of Transportation, South Korea
kaust.personYang, Seung Yeon
kaust.personNaser, Nimal
kaust.personChung, Suk Ho


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