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CFD Study of Heat Transfer Reduction Using Multiple Injectors in a DCEE Concept
Technical Paper
2019-01-0070
ISSN: 0148-7191, e-ISSN: 2688-3627
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Abstract
Earlier studies on efficiency improvement in CI engines have suggested that heat transfer losses contribute largely to the total energy losses. Fuel impingement on the cylinder walls is typically associated with high heat transfer. This study proposes a two-injector concept to reduce heat losses and thereby improve efficiency. The two injectors are placed at the rim of the bowl to change the spray pattern. Computational simulations based on the Reynolds-Averaged Navier-Stokes approach have been performed for four different fuel injection timings in order to quantify the reduction in heat losses for the proposed concept. Two-injector concepts were compared to reference cases using only one centrally mounted injector. All simulations were performed in a double compression expansion engine (DCEE) concept using the Volvo D13 single-cylinder engine. In the DCEE, a large portion of the exhaust energy is re-used in the second expansion, thus increasing the thermodynamic efficiency. To isolate the heat losses associated with the changed spray pattern of the two-injector concept, effects of the heat release are excluded during the analysis. Results showed that the optimal injection strategy allows a decrease in the temperature close to the walls, leading to heat loss reduction up to 13 % or 2 % of the fuel energy. The residual exhaust energy was increased by 1.5 %-points with the two-injector concept when compared to the reference case. This proved the advantage of the two-injector concept compared to conventional single injector case for the DCEE application.
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Nyrenstedt, G., Alturkestani, T., Im, H., and Johansson, B., "CFD Study of Heat Transfer Reduction Using Multiple Injectors in a DCEE Concept," SAE Technical Paper 2019-01-0070, 2019, https://doi.org/10.4271/2019-01-0070.Data Sets - Support Documents
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References
- European Commission 2 https://ec.europa.eu/clima/policies/transport/vehicles/heavy_en
- Bhavani Shankar , V. , Lam , N. , Andersson , A. , and Johansson , B. Optimum Heat Release Rates for a Double Compression Expansion (DCEE) Engine SAE Technical Paper 2017-01-0636 2017 10.4271/2017-01-0636
- Lam , N. , Tuner , M. , Tunestal , P. , Andersson , A. et al. Double Compression Expansion Engine Concepts: A Path to High Efficiency SAE Int. J. Engines 8 4 1562 1578 2015 10.4271/2015-01-1260
- Lam , N. , Andersson , A. , and Tunestal , P. Double Compression Expansion Engine Concepts: Efficiency Analysis over a Load Range SAE Technical Paper 2018-01-0886 2018 10.4271/2018-01-0886
- Bhavani Shankar , V.S. , Johansson , B. , and Andersson , A. Double Compression Expansion Engine: A Parametric Study on a High-Efficiency Engine Concept SAE Technical Paper 2018-01-0890 2018 10.4271/2018-01-0890
- Noehre , C. , Andersson , M. , Johansson , B. , and Hultqvist , A. Characterization of Partially Premixed Combustion SAE Technical Paper 2006-01-3412 2006 10.4271/2006-01-3412
- Caton , J.A. Comparisons of Global Heat Transfer Correlations for Conventional and High Efficiency Reciprocating Engines ASME. Internal Combustion Engine Division Fall Technical Conference, ASME 2011 Internal Combustion Engine Division Fall Technical Conference 327 337 10.1115/ICEF2011-60017
- Manente , V. , Johansson , B. , Tunestal , P. , and Cannella , W. Effects of Different Type of Gasoline Fuels on Heavy Duty Partially Premixed Combustion SAE Int. J. Engines 2 2 71 88 2010 10.4271/2009-01-2668
- Sjöberg , M. and Dec , J. Combined Effects of Fuel-Type and Engine Speed on Intake Temperature Requirements and Completeness of Bulk-Gas Reactions for HCCI Combustion SAE Technical Paper 2003-01-3173 2003 10.4271/2003-01-3173
- Okamoto , T. and Uchida , N. New Concept for Overcoming the Trade-Off between Thermal Efficiency, Each Loss and Exhaust Emissions in a Heavy Duty Diesel Engine SAE Int. J. Engines 9 2 859 2016 867 10.4271/2016-01-0729
- Reitz , R. and Diwakar , R. Structure of High-Pressure Fuel Sprays SAE Technical Paper 870598 1987 10.4271/870598
- Amsden , A.A. , O'rourke , P.J. , and Butler , T.D. 1989
- Richards , K.J. , Senecal , P.K. , and Pomraning , E. 2012
- Sivasankaralingam , V. , Raman , V. , Mubarak Ali , M. , Alfazazi , A. et al. Experimental and Numerical Investigation of Ethanol/Diethyl Ether Mixtures in a CI Engine SAE Technical Paper 2016-01-2180 2016 10.4271/2016-01-2180
- Amsden , A.A. 1997
- Babajimopoulos , A. , Assanis , D.N. , Flowers , D.L. , Aceves , S.M. et al. A Fully Coupled Computational Fluid Dynamics and Multi-Zone Model with Detailed Chemical Kinetics for the Simulation of Premixed Charge Compression Ignition Engines International Journal of Engine Research 6 497 512 2005 10.1243/146808705X30503
- Zeuch , T. , Moréac , G. , Ahmed , S.S. , and Mauss , F. A Comprehensive Skeletal Mechanism for the Oxidation of N-Heptane Generated by Chemistry-Guided Reduction Combustion and Flame 155 4 651 674 2008
- 2018
- Aronsson , U. , Solaka , H. , Lequien , G. , Andersson , O. et al. Analysis of Errors in Heat Release Calculations Due to Distortion of the In-Cylinder Volume Trace from Mechanical Deformation in Optical Diesel Engines SAE Int. J. Engines 5 4 1561 1570 2012 10.4271/2012-01-1604
- Sahoo , P.K. and Las , L.M. Combustion Analysis of Jatropha, Karanja and Polanga Based Biodiesel as Fuel in a Diesel Engine Fuel 88 6 994 999 2009
- Bengt , J. et al. Combustion Engines 1 Lund University 2014