20.500.12556/DKUM-80209 Vpliv piroliznih olj na tokovne razmere v vbrizgalni šobi dizelskega motorja diplomsko delo Influence of pyrolysis oils on the flow conditions in the injector nozzle of a diesel engine Namen diplomskega dela je ugotoviti vpliv dodatka piroliznih olj k dizelskemu gorivu na tokovne razmere v vbrizgalni šobi dizelskega motorja. Ker imajo pirolizna olja drugačne lastnosti kot konvencionalna goriva, lahko pričakujemo različno obnašanje goriva v vbrizgalni šobi. Za analizo problema so bile uporabljene numerične simulacije toka goriva v vbrizgalni šobi dizelskega motorja s programom AVL FIRE. Simulacije so se razlikovale po deležu dodanega piroliznega olja k dizelskemu gorivu. Pri simulacijah smo se omejili na eno geometrijo, enak potek dviga igle, enak tlak vbrizgavanja, enake obratovalne pogoje ter enak tlak v zgorevalni komori. Po izvedenih simulacijah smo opazili, da lastnosti mešanic goriv vplivajo na tokovne razmere in razvoj parne faze. Razlika v viskoznosti mešanic je vplivala na dolžino območja parne faze. Mešanice z nižjo viskoznostjo so bolj kavitirale, bolj viskozne pa manj. The purpose of this thesis was to determine the impact of the addition of pyrolysis fuels to diesel fuel on the fuel flow conditions in the injection nozzle of a diesel engine. Because pyrolysis oils have different properties than conventional fuels, we can expect different fuel behaviors in the injection nozzle. Numerical simulation of fuel flow in injection nozzle using the AVL FIRE computational program will be used to analyze the problem. The simulations differed in the proportion of pyrolysis oil added to the diesel fuel. Pyrolysis oils were not used as a stand-alone fuel. The simulations were limited to one geometry, the same needle lift, same injection pressure, same operating conditions, and same chamber pressure. After the simulations, it was observed that the properties of fuel mixtures affect the flow conditions and the development of the vapor phase. The difference in the viscosity of the mixtures affected the length of the vapor phase range. Mixtures with lower viscosity were more cavitated and more viscous less. goriva pirolizna olja dizelski motor numerična simulacija programski paket FIRE dizel fuels pyrolysis oils diesel engine numerical simulation software package FIRE diesel true true false [J. Omahen] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2021-09-01 21:36:21 2021-09-24 10:54:02 2022-08-09 22:37:58 0000-00-00 00:00:00 2021 0 Maribor 0 Maribor VII, 38 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 665.753(043.2) 85347587 UN_Omahen_Jure_2021.pdf UN_Omahen_Jure_2021.pdf 1 736ED271078A2E466CB7ACC31EAD072F cdba1fd0d60c4291676e6fbb02f5cbd1d86041406246cbb044c97658785446c0 ae6a75ac-19ed-11ec-9280-00155d581298 20.500.12556/dkum/ccbf8789-bf3e-4d44-b067-5d13ad2cdff6 https://dk.um.si/Dokument.php?lang=slv&id=154183 Fakulteta za strojništvo 0 0 0