LEADER 03233nam 2200433 450 001 9910822333603321 005 20230802001542.0 010 $a3-8325-9702-6 035 $a(CKB)4340000000242381 035 $a(MiAaPQ)EBC5216710 035 $a(Au-PeEL)EBL5216710 035 $a(CaPaEBR)ebr11539359 035 $a(OCoLC)1021805445 035 $a58a1c6a4-4f74-4d5d-ba11-3edeb0dd2d03 035 $a(EXLCZ)994340000000242381 100 $a20180521d2012 uy 0 101 0 $aeng 135 $aurcnu|||||||| 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aDevelopment of a partially premixed combustion model for a diesel engine using multiple injection strategies /$fRene Thygesen 210 1$aBerlin :$cLogos Verlag,$d[2012] 210 4$dİ2012 215 $a1 online resource (160 pages) 300 $aPublicationDate: 20120229 311 $a3-8325-3093-2 330 $aLong description: In order to fulfil future emissions legislations, new combustion systems are to be investigated. One way of improving exhaust emissions is the application of multiple injection strategies and conventional or partially premixed combustion conditions to a Diesel engine. The application of numerical techniques as CFD supports and improves the quality of engine developments. Unfortunately, current spray and combustion models are not accurate enough to simulate multiple injection systems, being in this way a topic of research. The goal of this study was the development of a novel simulation method for the investigation of Diesel engines operated with multiple injection strategies and different combustion modes. The first part of this work focused in improving the spray modelling. The inform ation of 3D CFD simulations of the injector nozzle was introduced in the spray simulation as boundary conditions developing coupling subroutines for this issue. The atomisation modelling was also improved using validated presumed droplet size distributions. Moreover, to avoid the simulation of the injector nozzle for every investigated operating point, a novel interpolating tool was developed in order to create spray boundary conditions based on few 3D CFD simulations of the nozzle under certain initial and boundary conditions. The second part of this thesis dealt with the combustion modelling of Diesel engines. For this issue, a laminar flamelet approach called Representative Interactive Flamelet model (RIF) was selected and implemented. Afterwards, an extended combustion model based on RIF was developed in order to take into account multiple injection strategies. Finally, this new model was validated with a wide range of operating points: applying multiple injection strategies under conventional and partially premixed combustion conditions. 606 $aDiesel engines$xModels 615 0$aDiesel engines$xModels. 676 $a621.436 700 $aThygesen$b Rene$01621415 801 0$bMiAaPQ 801 1$bMiAaPQ 801 2$bMiAaPQ 906 $aBOOK 912 $a9910822333603321 996 $aDevelopment of a partially premixed combustion model for a diesel engine using multiple injection strategies$93954673 997 $aUNINA