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http://localhost:8080/xmlui/handle/123456789/2586| Title: | Effective reduction of in-cylinder peak pressures in Homogeneous Charge Compression Ignition Engine - A computational study |
| Authors: | Karthikeya Sharma, T. Rao, G.Amba Prasad Madhu Murthy, K. |
| Keywords: | HCCIengine EGR |
| Issue Date: | 2015 |
| Publisher: | Alexandria Engineering Journal |
| Citation: | 10.1016/j.aej.2015.04.006 |
| Abstract: | HCCImodeofcombustionisknownforsimultaneousreductionofNOxandPMemissionsbesidesyieldinglowspecificfuelconsumption.ThenatureofvolumetriccombustionofHCCI engineleadstothedevelopmentofhighpeakpressuresinsidethecombustionchamber.Thishigh peakpressuresmaydamage theengine, limitingtheHCCIengine lifeperiodandthusdemands sturdydesigns.Inthisstudyanattemptismadetoanalyzecomputationallytheeffectofinduction swirl inreducingthepeakpressuresofaHCCIengineundervariousoperatingparameters.Forthe study,specificationsofasinglecylinder1.6L,reentrantpistonbowldieselenginearechosen.For thecomputationalanalysisECFM-3ZmodelofSTARCDisconsidered.Thismodel issuitableto analyzethecombustionprocessesinSIandCIengines.AsHCCIengineisahybridversionofSI andCIengines,ECFM-3Zmodelwithnecessarymodificationsisusedtoanalyzethepeakpressures insidethecombustionchamber.TheECFM-3Zmodel forHCCImodeofcombustionisvalidated withtheexistingliteraturetomakesurethattheresultsobtainingareaccurate.Numericalexperimentsareperformedtostudytheeffectofcompressionratio,equivalenceratio,exhaustgasrecirculationandboostpressureunderdifferentswirlratiosinreducingthein-cylinderpeakpressures. TheresultsshowedthatswirlratiohasaconsiderableimpactinlimitingthepeakpressuresofHCCI engine.Theanalysisresultedinachievingabout21%reductioninpeakpressuresareachievedwhen aswirlratioof4with30%EGRisadoptedwhencomparedtoaswirlratioof1with0%EGR.The studyrevealedthatoutofthefouroperatingparametersselected, lowercompressionratios,higher EGRconcentrations, lowerequivalenceratios, lowerboostpressuresandhigher swirl ratiosare favorableinreducingthepeakpressures. |
| Description: | NITW |
| URI: | http://localhost:8080/xmlui/handle/123456789/2586 |
| Appears in Collections: | Mechanical Engineering |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 1-s2.0-S111001681500054X-main.pdf | 2.3 MB | Adobe PDF | View/Open |
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