Inscrição na biblioteca: Guest
Portal Digital Begell Biblioteca digital da Begell eBooks Diários Referências e Anais Coleções de pesquisa
Atomization and Sprays
Fator do impacto: 1.262 FI de cinco anos: 1.518 SJR: 0.814 SNIP: 1.18 CiteScore™: 1.6

ISSN Imprimir: 1044-5110
ISSN On-line: 1936-2684

Volumes:
Volume 29, 2019 Volume 28, 2018 Volume 27, 2017 Volume 26, 2016 Volume 25, 2015 Volume 24, 2014 Volume 23, 2013 Volume 22, 2012 Volume 21, 2011 Volume 20, 2010 Volume 19, 2009 Volume 18, 2008 Volume 17, 2007 Volume 16, 2006 Volume 15, 2005 Volume 14, 2004 Volume 13, 2003 Volume 12, 2002 Volume 11, 2001 Volume 10, 2000 Volume 9, 1999 Volume 8, 1998 Volume 7, 1997 Volume 6, 1996 Volume 5, 1995 Volume 4, 1994 Volume 3, 1993 Volume 2, 1992 Volume 1, 1991

Atomization and Sprays

DOI: 10.1615/AtomizSpr.2011002836
pages 107-119

MODELING CHARGE PREPARATION AND COMBUSTION IN DIESEL FUEL, ETHANOL, AND DUAL-FUEL PCCI ENGINES

Sage kokjohn
Department of Mechanical Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
Derek A. Splitter
Department of Mechanical Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
Reed M. Hanson
Department of Mechanical Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
Rolf D. Reitz
Engine Research Center, University of Wisconsin-Madison, Rm 1018A, 1500 Engineering Drive, Madison, Wisconsin 53706, USA
Vittorio Manente
Division of Combustion Engines, Department of Energy Sciences, Lund University, SE-221 00 Lund, Sweden
Bengt Johansson
Division of Combustion Engines, Department of Energy Sciences, Lund University, SE-221 00 Lund, Sweden

RESUMO

In this work, multi-dimensional computational fluid dynamics modeling predictions are compared for three different methods of achieving high-efficiency, low NOx, and soot premixed charge compression ignition (PCCI) combustion. The first method is early injection, highly dilute (i.e., low oxygen concentration), diesel fuel PCCI operation. In this method, the oxygen concentration is reduced to extend the ignition delay to allow adequate time for mixing prior to autoignition. The second method is early injection PCCI operation using neat ethanol. In this method, the fuel reactivity is sufficiently low such that PCCI combustion can be achieved without using external dilution. The final method, dual-fuel reactivity controlled compression ignition (RCCI) combustion, blends fuels with different ignition qualities in the combustion chamber to tailor the auto-ignition properties of the mixture for the specific operating condition. In this study, RCCI operation was investigated using in-cylinder fuel blending of diesel fuel and gasoline as well as diesel fuel and an E85 blend (i.e., 85% ethanol and 15% gasoline). It was found that the modeling approach used in this work is capable of capturing the bulk combustion characteristics (e.g., cylinder pressure) as well as the details of the injection event (e.g., liquid penetration) and ignition processes. The simulations were shown to provide accurate predictions of the differences in combustion characteristics of diesel fuel, ethanol, and fuel blends (i.e., gasoline + diesel fuel and E85 + diesel fuel). It was found that the ethanol PCCI and dual-fuel (gasoline + diesel fuel and E85 + diesel fuel) RCCI cases have significantly reduced rates of energy release compared to neat diesel fuel PCCI operation. The reduced energy release rates of the ethanol PCCI and dual-fuel RCCI cases may allow these modes of PCCI combustion to achieve higher engine loads than that of neat diesel PCCI.


Articles with similar content:

A NUMERICAL STUDY ON A LIGHT-DUTY DIESEL ENGINE FUELED WITH BLENDS OF GASOLINE AND DIESEL
Atomization and Sprays, Vol.25, 2015, issue 8
Guoliang Li, Manzhi Tan, Liang Guo, Wanchen Sun, Senlin Xiao, Luyan Fan
ANALYSIS OF HOMOGENEOUS CHARGE COMPRESSION IGNITION ENGINE WITH EMPHASIS ON COMBUSTION TIMING AND REACTION RATE
4th Thermal and Fluids Engineering Conference, Vol.3, 2019, issue
Arunim Bhattacharya, Pradip Majumdar
NUMERICAL INVESTIGATION OF ENGINE SPEED AND FUEL COMPOSITION EFFECTS ON CONVECTIVE HEAT TRANSFER IN A SPARK IGNITION ENGINE FUELLED WITH METHANE-HYDROGEN BLENDS
ICHMT DIGITAL LIBRARY ONLINE, Vol.0, 2017, issue
Simona Silvia Merola, Adrian Irimescu, Paolo Sementa, Silvana Di Iorio, Bianca Maria Vaglieco
THE EFFECTS OF AIR-ASSIST UPON LIQUID FUEL JET PENETRATION AND DISPERSION IN A CROSS-FLOW OF PREHEATED AIR
Atomization and Sprays, Vol.26, 2016, issue 11
O. Bibik, B. T. Zinn, D. Shcherbik, E. Lubarsky, Zu Puayen Tan
EFFECTS OF EARLY-INJECTION STRATEGY ON THE COMBUSTION AND EMISSION CHARACTERISTICS OF A PCCI DIESEL ENGINE
Atomization and Sprays, Vol.27, 2017, issue 1
Sangki Park, Ki-Hyung Lee, Woong Il Kim