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dc.contributor.authorLiu, Xinlei
dc.contributor.authorAljabri, Hammam H.
dc.contributor.authorAl-lehaibi, Moaz
dc.contributor.authorAlRamadan, Abdullah S
dc.contributor.authorBadra, Jihad
dc.contributor.authorIm, Hong G.
dc.date.accessioned2021-11-29T08:20:52Z
dc.date.available2021-11-29T08:20:52Z
dc.date.issued2021-11-25
dc.identifier.citationLiu, X., Aljabri, H., Al-lehaibi Moaz, AlRamadan, A. S., Badra, J., & Im, H. G. (2021). Numerical investigation of the effect of injection strategy on a high-pressure isobaric combustion engine. International Journal of Engine Research, 146808742110601. doi:10.1177/14680874211060156
dc.identifier.issn1468-0874
dc.identifier.issn2041-3149
dc.identifier.doi10.1177/14680874211060156
dc.identifier.urihttp://hdl.handle.net/10754/673814
dc.description.abstractHigh-pressure isobaric combustion adopted in the double compression expansion engine (DCEE) has the prospect to achieve higher thermal efficiency compared to conventional diesel combustion. This work numerically explored the effects of various injection strategies on the combustion and emission characteristics of isobaric combustion. The study developed a mathematical model to predict the injection rate profile. After validations, extensive simulations were conducted with a peak pressure of up to 300 bar – mimicking the high-pressure unit of DCEE. Several major engine design parameters such as the exhaust recirculation gas (EGR) rate, engine speed, injection strategy, and intake pressure were varied and evaluated. The results demonstrated that a higher EGR rate resulted in a higher exhaust loss but a lower heat transfer loss owing to the lower combustion temperature, so the thermal efficiency exhibited a firstly growing and then declining trend. Besides, a higher engine speed generated a higher thermal efficiency due to the shorter combustion duration and thus lower heat transfer loss. Consequently, a peak thermal efficiency of 47.5% was achieved at EGR = 50% and 1800 rpm. The high-pressure cylinder performance can also be improved with an appropriate introduction of the isochoric combustion, but its impact on the whole DCEE setup needs further investigation.
dc.publisherSAGE Publications
dc.relation.urlhttp://journals.sagepub.com/doi/10.1177/14680874211060156
dc.rightsArchived with thanks to International Journal of Engine Research
dc.titleNumerical investigation of the effect of injection strategy on a high-pressure isobaric combustion engine
dc.typeArticle
dc.contributor.departmentClean Combustion Research Center
dc.contributor.departmentComputational Reacting Flow Laboratory (CRFL)
dc.contributor.departmentMechanical Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalInternational Journal of Engine Research
dc.eprint.versionPost-print
dc.contributor.institutionMechanical Engineering Department, College of Engineering and Islamic Architecture, Umm Al-Qura University, Makkah, Saudi Arabia
dc.contributor.institutionTransport Technologies Division, R&DC, Saudi Aramco, Dhahran, Saudi Arabia
dc.identifier.pages146808742110601
kaust.personLiu, Xinlei
kaust.personAljabri, Hammam
kaust.personAl-lehaibi, Moaz
kaust.personIm, Hong G.
refterms.dateFOA2021-11-29T08:52:41Z


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