图书馆订阅: Guest
Begell Digital Portal Begell 数字图书馆 电子图书 期刊 参考文献及会议录 研究收集
雾化与喷雾
影响因子: 1.262 5年影响因子: 1.518 SJR: 0.814 SNIP: 1.18 CiteScore™: 1.6

ISSN 打印: 1044-5110
ISSN 在线: 1936-2684

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

雾化与喷雾

DOI: 10.1615/AtomizSpr.2014010506
pages 779-800

EVALUATION OF TURBULENCE-CHEMISTRY INTERACTION UNDER DIESEL ENGINE CONDITIONS WITH MULTI-FLAMELET RIF MODEL

Prithwish Kundu
Energy Systems Division, Argonne National Laboratory, Argonne, Illinois, 60439; North Carolina State University, Raleigh, North Carolina 27607, USA
Yuanjiang Pei
Energy Systems Division, Argonne National Laboratory, Argonne, Illinois, 60439, USA
Mingjie Wang
Convergent Science, Inc., Middleton, Wisconsin 53562, USA
Raju Mandhapati
Convergent Science, Inc., Middleton, Wisconsin 53562, USA
Sibendu Som
Energy Systems Division, Argonne National Laboratory, Argonne, Illinois, 60439, USA

ABSTRACT

The multi-flamelet representative interactive flamelet (RIF) model is used to account for the effects of turbulence-chemistry interaction (TCI) to model spray combustion under typical diesel engine conditions. The RIF model calculates the species mass fraction based on the mixture fraction fields and scalar dissipation rates provided by the computational fluid dynamics solver. A time-dependent renormalization group turbulence model is used in conjunction with a grid-converged discrete phase model for the liquid phase. The minimum number of flamelets required is determined to sufficiently represent the large variation of stoichiometric scalar dissipation rates in the domain. Different forms of the presumed scalar probability density functions (PDFs) were also examined. The modeling results are then compared with the experimental data at different ambient temperatures, ambient O2 concentrations, ambient densities, and injection pressures. The effects of different chemical kinetic mechanisms (103-species and 106-species skeletal mechanisms) are also studied to further understand the performance of the model. Overall, the RIF model is observed to capture the measured ignition delay and flame lift-off length very well, especially under certain conditions characterized by low ambient temperatures, densities, and oxygen concentrations. The need for initializing multiple flamelets is highlighted in order to obtain simulation results devoid of modeling artifacts. Overall, the efficacy of using an advanced turbulence combustion model is demonstrated.


Articles with similar content:

COMPREHENSIVE COLLISION MODEL FOR MULTIDIMENSIONAL ENGINE SPRAY COMPUTATIONS
Atomization and Sprays, Vol.19, 2009, issue 7
Rolf D. Reitz, Achuth Munnannur
THE EFFECT OF SWIRLING NUMBER VARIATION ON TURBULENT TRANSPORT AND MIXING PROCESSES IN SWIRLING RECIRCULATING FLOWS: EXPERIMENTAL AND NUMERICAL INVESTIGATIONS
TSFP DIGITAL LIBRARY ONLINE, Vol.2, 2001, issue
Andreas Dreizler, Johannes Janicka, Amsini Sadiki, Stefan Repp, Christoph Schneider
ANALYSIS OF TRANSIENT LIQUID AND VAPOR PHASE PENETRATION FOR DIESEL SPRAYS UNDER VARIABLE INJECTION CONDITIONS
Atomization and Sprays, Vol.21, 2011, issue 6
Raul Payri, Francisco J. Briceno, Jose M. Garcia-Oliver, Jose V. Pastor
CHEMICAL KINETICS ANALYSIS FOR LIFTED TURBULENT JET FLAME USING MULTI-FLAMELET GENERATED MANIFOLD APPROACH
Proceedings of the 24th National and 2nd International ISHMT-ASTFE Heat and Mass Transfer Conference (IHMTC-2017), Vol.0, 2017, issue
Ashoke De, Venu G. Agarwal, Rohit Saini, Rakesh Yadav
Multiscale Modeling of the Negative Strain-Rate Sensitivity in Solid Solutions: A Constitutive Formulation
International Journal for Multiscale Computational Engineering, Vol.3, 2005, issue 4
Catalin Picu, M. A. Soare