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Ignition Behaviour of Marine Diesel Fuels under Engine Like Conditions
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 13, 2014 by SAE International in United States
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In view of the large (and further increasing) range of fuels applied in marine diesel engines, there is a clear need for obtaining a better understanding of the effect of those fuels on the key in-cylinder processes governing the combustion characteristics of these engines. For this purpose, a constant volume chamber representative of the combustion system of large marine diesel engines has been complemented with a device allowing the investigation of small fuel quantities and the resulting setup has been used for studying the combustion behaviour of typical marine diesel fuels at conditions relevant for large marine two-stroke diesel engines. Specifically, two clearly distinct heavy fuel oils have been compared to a light fuel oil.
Two optical measurement techniques were used to complement the findings made on the basis of rate of heat release analysis. A combination of the shadow imaging technique with the OH*-chemiluminescence method was applied to investigate spray tip penetration, ignition delay, ignition location, flame lift off as well as flame development of the heavy fuels in comparison with a light fuel oil.
The ignition delay was found to be more than doubled with the heavy fuels, whereas the distance of the ignition spot from the injector was only marginally affected. During the very early combustion, light fuel oil burned quicker than the heavy fuels, but once the conditions were right to allow fast evaporation of the heavy fuels, the flame expansion was at comparable rates for all fuels. The shape and position of the flame area in the later stage on the other hand also exhibits a distinct influence of fuel quality as the area covered by the flame is clearly larger for the heavy fuel oil cases. At the same time, the flame lift-off for those fuels is also increased compared to the reference fuel. However, the evaluation of the overall combustion behaviour on the basis of the heat release rate analysis data shows that this difference in initial behaviour disappears during the main combustion phase. In fact, the overall combustion quality was virtually the same for all cases.
CitationSchmid, A., Von Rotz, B., Weisser, G., and Herrmann, K., "Ignition Behaviour of Marine Diesel Fuels under Engine Like Conditions," SAE Technical Paper 2014-01-2656, 2014, https://doi.org/10.4271/2014-01-2656.
- IMO, Annex VI of MARPOL 73/78 Regulations for the Prevention of Air Pollution from Ships and NOx Technical Code EA664E London 2009
- Wiesmann , A. Slow steaming - a viable long-term option? WÄRTSILÄ Technical Journal 02 2010 49 55 2010
- Service Bulletin, RT-82 29 06 2009 Wärtsilä Switzerland Ltd.
- Herrmann , K. , Schulz , K. and Weisser , G. Development of a reference experiment for large diesel engine combustion system optimization CIMAC Congress 2007 Vienna, Austria
- Kyrtatos N.P. , Kleimola M. , Marquard R. The HERCULES Project: A major R&D effort for marine engines of high efficiency and low emissions CIMAC Congress 2007 Vienna, Austria
- Herrmann K. , Kyrtatos A. , Schulz R. , Weisser G. , von Rotz B. , Schneider B. , Boulouchos K. Validation and Initial Application of a Novel Spray Combustion Chamber Representative of Large Two-Stroke Diesel Engine Combustion Systems ICLASS 2009 Vail, Colorado USA
- Fankhauser , S. , Heim , K. The Sulzer RT-flex: Launching the era of common rail on low speed engines CIMAC Congress 2001 Hamburg, Germany
- Von Rotz , B. , Herrmann , K. , Weisser , G. , Cattin , M. and Boulouchos , K. Impact of Evaporation, Swirl and Fuel Quality on the Characteristics of Sprays typical of Large 2-Stroke Marine Diesel Engine Combustion Systems ILASS - Europe 2011 Estoril, Portugal
- Schmid , A. , Von Rotz B. , Bombach , R. et al. Ignition Behaviour of Marine Diesel Sprays COMODIA2012 Fukuoka, Japan
- Schneider , B. Experimentelle Untersuchung zur Spraystruktur in transienten, verdampfenden und nicht verdampfenden Brennstoffstrahlen unter Hochdruck P.h.D. thesis Diss. ETH Nr. 15004 Department of Mechanical and Process Engineering. Zürich, ETH Zürich
- Herrmann K. , von Rotz B. , Schulz R. , Weisser G. et al. Reference Data Generation of Spray Characteristics in Relation to Large 2-Stroke Marine Diesel Engines Using a Novel Spray Combustion Chamber Concept ILASS-Europe 2010 Brno, Czech Republic
- Vögelin Ph. , Bertola A. , Obrecht P. , Boulouchos K. Final report of the CTI -Project 10604 Zürich 2011 http://www.kti.admin.ch
- Barro , C. et al. Influence of Post-Injection Parameters on Soot Formation and Oxidation in a Common-Rail-Diesel Engine using Multi-Color-Pyrometry ASME ICEF-920752012 Vancouver BC
- Lewis , C.P.G. , Schenk , C. and Stassen , W.J.M. Ignition Quality of Residual Fuels in Diesel Engines Shell Research and Technology Centre Amsterdam 1998
- Hiroyasu , H. and Arai , M. Structures of Fuel Sprays in Diesel Engines SAE Technical Paper 900475 1990 10.4271/900475
- Siebers , D. and Higgins , B. Flame Lift-Off on Direct-Injection Diesel Sprays Under Quiescent Conditions SAE Technical Paper 2001-01-0530 2001 10.4271/2001-01-0530