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http://yadda.icm.edu.pl:80/baztech/element/bwmeta1.element.baztech-7eea6faa-9bf9-4dec-bf64-efee3dd0a548

Czasopismo

Combustion Engines

Tytuł artykułu

Numerical investigation on diesel combustion and emissions with a standard combustion model and detailed chemistry

Autorzy Pyszczek, R.  Schmalhorst, C.  Teodorczyk, A. 
Treść / Zawartość
Warianty tytułu
Konferencja International Congress on Combustion Engines (5 ; 24-26.06.2013 ; Bielsko-Biala, Poland)
Języki publikacji EN
Abstrakty
EN The aim of this study was to determine possibilities of the soot and NOx emissions reduction from an existing heavy-duty compression-ignition (CI) engine based only on in-cylinder techniques. To that end numerical simulations of such processes as a multiphase fuel flow through injector nozzles, a liquid fuel jet breakup and evaporation, combustion and emissions formation were performed in AVL Fire 3D CFD software. The combustion process was calculated with the ECFM-3Z model and with the detailed n-heptane oxidation scheme that consisted of 76 species and 349 reactions. Both approaches of combustion modeling were validated against experimental data from the existing engine working under 75% and 100% loads. As for the reduction of the NOx emission an introduction of exhaust gas recirculation (EGR) was investigated. As for the soot concentration reduction such measures as an increased rail pressure, application of a post-injection and an increased injector nozzles conicity were investigated. Finally the ECFM-3Z model with emissions models, as well as the n-heptane mechanism predicted that it is possible to reach specified emissions limits with application of EGR, post-injection and increased nozzles conicity.
Słowa kluczowe
PL olej napędowy   n-heptan   spalanie   emisja   sadza  
EN diesel   n-heptane   ECFM-3Z model   combustion   emissions   soot   NOx   EGR   post-injection  
Wydawca Polskie Towarzystwo Naukowe Silników Spalinowych
Czasopismo Combustion Engines
Rocznik 2015
Tom R. 54, nr 3
Strony 19--33
Opis fizyczny Bibliogr. 15 poz., il., wykr.
Twórcy
autor Pyszczek, R.
autor Schmalhorst, C.
autor Teodorczyk, A.
Bibliografia
[1] Metz B., Davidson O.R., Bosch P.R., Dave R., Meyer L.A. Contribution of working group III to the fourth assessment report of the intergovernmental panel on climate change. Cambridge University Press, Cambridge, United Kingdom and New York 2007.
[2] Emission Standards, International Maritime Organization. [Accessed: 20.03.2015]. www.dieselnet.com/standards/inter/imo.php#nox.
[3] Nehmer D., Reitz R. Measurement of the effect of injection rate and split injections on diesel engine soot and NOx emissions. SAE Technical Paper 940668, 1994.
[4] Tow T., Pierpont D., Reitz R. Reducing particulates and NOx emissions by using multiple injections in a heavy duty D.I. diesel engine. SAE Technical Paper 940897, 1994.
[5] Pierpont D., Montgomery D., Reitz R. Reducing particulate and NOx using multiple injections and EGR in a DI diesel. SAE Technical Paper 950217, 1995.
[6] O’Connor J., Musculus M. Post injections for soot reduction in diesel engines: a review of current understanding. SAE Technical Paper 2013-01-0917, 2013.
[7] You Z., Hessel R., Reitz R. CFD study of soot reduction mechanisms of post-injection in spray combustion. SAE Technical Paper 2015-01-0794, 2015.
[8] Wang H., Yao M., Reitz R. Development of a reduced primary reference fuel (PRF) mechanism for IC engine combustion simulations. Energy & Fuels, 27 (12), 2013, 7843–7853.
[9] Wang H., Reitz D., Yao M., Yang B., Jiao Q., Qiu L. Development of an n-heptane/n-butanol/PAH mechanism and its application for combustion and soot prediction. Combustion and Flame, 160, 2013, 504–519.
[10] Hanjalić K., Popovac M., Hadziabdić M. A robust near-wall elliptic-relaxation eddy-viscosity turbulence model for CFD. International Journal of Heat and Fluid Flow, 25(6), 2004, 1047–1051.
[11] AVL Fire spray module manual v2014.
[12] AVL Fire combustion module manual v2014.
[13] AVL Fire emission module manual v2014.
[14] Afzal S. Prediction of diesel-spray preparation of a common-rail injector. Technische Universität München. Master’s Thesis, 2014.
[15] Lakshminarayanan P.A., Aghav Y.V. Modelling diesel combustion. Springer, Netherlands 2010.
Kolekcja BazTech
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