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Numerical study of the effects of split injection strategy and swirl ratio for biodiesel PCCI combustion and emissions

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Propulsion and Power Research 2020年第4期9卷 355-371页

作者： alborz zehni Navid Balazadeh Mojtaba Hajibabaei Kamran Poorghasemi Engine Research Center Mega Motor CorpTehranIran Department of Mechanical Engineering Sharif University of TechnologyTehranIran Department of Mechanical Engineering Iran University of Science and TechnologyTehranIran Department of Mechanical Engineering Shabestar BranchIslamic Azad UniversityShabestarIran

New methods have been studied in the past few decades to decrease exhaust emissions and fuel consumption of diesel *** new combustion methods as low-temperature combustion(LTC)strategies and also utilizing new fuels as bio-diesel are beneficial ways to overcome diesel engine *** numerical study focused on the effect of split injection strategies as well as swirl ratio(SR)on the biodiesel premixed charge compression ignition(PCCI)combustion process and the related *** this regard,KIVA-3V code as a CFD tool has been utilized to analyze the combustion and emission characteristics of the diesel *** and split injection strategies have been executed on biodiesel PCCI combustion and have been compared in order to probe and examine the injection *** results show that in both strategies,advancing the injection timing can lower the combustion emission and improve the engine performance by optimizing the start of injection(SOI)as sweet spot *** a high swirl ratio with the split injection strategy has a negative effect on overall combustion,emission,and performance in comparison with the single injection *** multi-injection scheme,SOI=−35 ATDC,SR=1.1,and for single injection scheme,SOI=−40 ATDC,SR=1.1 are considered as optimum cases regarding minimum total exhaust emissions and highest performance.

关键词： Premixed charge compression ignition(PCCI) Split injection Swirl ratio Biodiesel Combustion Emission

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