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Coupled Simulation of Nozzle Flow and Spray Formation Using Diesel and Biodiesel for CI Engine Applications
Technical Paper
2012-01-1267
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A two-step simulation methodology was applied for the computation of the injector nozzle internal flow and the spray evolution in diesel engine-like conditions. In the first step, the multiphase cavitating flow inside injector nozzle is calculated by means of unsteady CFD simulation on moving grids from needle opening to closure. A non-homogeneous Eulerian multi-fluid approach - with three phases i.e. liquid, vapor and air - has been applied. Afterward, in the second step, transient data of spatial distributions of velocity, turbulent kinetic energy, dissipation rate, void fraction and many other relevant properties at the nozzle exit were extracted and used for the subsequent Lagrangian spray calculation. A primary break-up model, which makes use of the transferred data, is used to initialize droplet properties within the hole area.
The paper focuses on the analysis of the injection process comparing the effects different fuels - a standard diesel fuel and a pure biodiesel, methyl ester of soybean oil - in two types of nozzles, i.e. cavitating and non-cavitating.
Biodiesel fuel is characterized by higher density, higher viscosity and lower vapor pressure, compared to diesel fuel. Extent of cavitation region was found to be strongly dependent on the nozzle shape, whereas not much affected by the fuel type. Detailed analyses of the injection processes are presented, including flow pattern development inside the nozzles. Simulations of the spray evolution are also discussed highlighting the differences between the use of fossil and biodiesel fuels in terms of spray penetration, atomization and spray angle. Simulations of spray evolutions, in non-evaporative conditions, highlighted that hole shape affects diesel penetration and angle. Biodiesel spray, instead, is less sensitive to hole shaping. SMD is larger for biodiesel, irrespectively of hole shape and injection pressure. Diesel fuel in non-cavitating nozzle provides higher penetration and lower spray angle.
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Battistoni, M., Grimaldi, C., and Mariani, F., "Coupled Simulation of Nozzle Flow and Spray Formation Using Diesel and Biodiesel for CI Engine Applications," SAE Technical Paper 2012-01-1267, 2012, https://doi.org/10.4271/2012-01-1267.Also In
References
- Priesching, P. Pavlovic, Z. Ertl, P. Giacomo, N. et al. “Numerical and Experimental Investigation of the Influence of Bio-Diesel Blends on the Mixture Formation, Combustion and Emission Behavior of a Modern HSDI Diesel Engine,” SAE Technical Paper 2009-24-0041 2009 10.4271/2009-24-0041
- Grimaldi, C. Postrioti, L. Battistoni, M. Millo, F. “Common Rail HSDI Diesel Engine Combustion and Emissions with Fossil / Bio-Derived Fuel Blends,” SAE Technical Paper 2002-01-0865 2002 10.4271/2002-01-0865
- Postrioti, L. Battistoni, M. Grimaldi, C. Millo, F. “Injection Strategies Tuning for the Use of Bio-Derived Fuels in a Common Rail HSDI Diesel Engine,” SAE Technical Paper 2003-01-0768 2003 10.4271/2003-01-0768
- Patterson, J. Hassan, M. Clarke, A. Shama, G. et al. “Experimental Study of DI Diesel Engine Performance Using Three Different Biodiesel Fuels,” SAE Technical Paper 2006-01-0234 2006 10.4271/2006-01-0234
- Lujan, J.M. Tormos, B. Salvador, F.J. Gardar, K. 2009 “Comparative analysis of a DI Diesel engine fuelled with biodiesel blends during the European MVEG-A cycle: preliminary study (I)” Biomass and Energy 33 6-7 941 947
- Lujan, J.M. Bermúdez, V. Tormos, B. Pla, B. 2009 “Comparative analysis of a DI Diesel engine fuelled with biodiesel blends during the European MVEG-A cycle: performances and emissions (II)” Biomass and Energy 33 6-7 948 956
- Battistoni, M. 2004 “Experimental Analysis of a Common-Rail DI Diesel Engine Fuelled with Bio-Derived Alternative Fuels” Ph.D. Thesis University of Perugia
- Desantes, J. Payri, R. Salvador, F. Manin, J. “Influence on Diesel Injection Characteristics and Behavior Using Biodiesel Fuels,” SAE Technical Paper 2009-01-0851 2009 10.4271/2009-01-0851
- Allocca, L. Mancaruso, E. Montanaro, A. Vaglieco, B. et al. “Renewable Biodiesel/Reference Diesel Fuel Mixtures Distribution in Non-Evaporating and Evaporating Conditions for Diesel Engines,” SAE Technical Paper 2009-24-0054 2009 10.4271/2009-24-0054
- Park, S. H. Kim, H. J. Suh, H. K. Lee, C. S. 2009 “A study on the fuel injection and atomization characteristics of soybean oil methyl ester (SME)” International Journal of Heat and Fluid Flow 30 2009 108 116
- Grimaldi, C. Postrioti, L. “Experimental Comparison Between Conventional and Bio-derived Fuels Sprays from a Common Rail Injection System,” SAE Technical Paper 2000-01-1252 2000 10.4271/2000-01-1252
- Postrioti, L. Grimaldi, C. Ceccobello, M. Di Gioia, R. “Diesel Common Rail Injection System Behavior with Different Fuels,” SAE Technical Paper 2004-01-0029 2004 10.4271/2004-01-0029
- Som, S. Longman, D. E. Ramirez, A. I. Aggarwal, S. K. 2010 “A comparison of injector flow and spray characteristics of biodiesel with petrodiesel” Fuel 89 4014 4024
- Som, S. Ramirez, A. I. Longman, D. E. Aggarwal, S. K. 2011 “Effect of nozzle orifice geometry on spray, combustion, and emission characteristics under diesel engine conditions” Fuel 90 1267 1276
- Avl List GmbH 2010 “AVL Fire v.2010: CFD Solver; Eulerian Multiphase; ICE Physics & Chemistry”
- Brennen, C.E. 2005 “Fundamentals of Multiphase Flows” Cambridge University Press
- Alajbegovic, A. Grogger, H. A. Philipp, H. 1999 “Calculation of Transient Cavitation in Nozzle Using the Two-Fluid Model” ILASS-Americas 99, Conference Proceedings
- Drew, D.A. Passman, S.L. 1998 “Theory of Multicomponent Fluids” Springer New York
- Hanjalic, K. Popovac, M. Hadziabdic, M. 2004 “A robust near-wall elliptic relaxation eddy-viscosity turbulence model for CFD” Int. J. of Heat and Fluid Flow 25 6 1360 1378
- Popovac, M. Hanjalic, K. 2007 “Compound Wall Treatment for RANS Computation of Complex Turbulent Flows and Heat Transfer” Int. J. of Heat and Fluid Flow 78 2 177 202
- Hinze, J.O. 1975 “Turbulence” McGraw-Hill New York
- Battistoni, M. Grimaldi, C. “Analysis of Transient Cavitating Flows in Diesel Injectors Using Diesel and Biodiesel Fuels,” SAE Int. J. Fuels Lubr. 3 2 879 900 2010 10.4271/2010-01-2245
- Battistoni, M. Grimaldi, C.N. 2011 “Numerical analysis of injector flow and spray characteristics from diesel injectors using fossil and biodiesel fuels” Applied Energy 10.1016/j.apenergy.2011.11.080
- Tatschl, R. v. Künsberg Sarre, C. Alajbegovic, A. Winklhofer, E. 2000 “Diesel Spray Break-up Modelling Including Multidimensional Cavitation Nozzle Flow Effects” Proceedings of ILASS-Europe 2000 Darmstadt
- Masuda, R. Fuyuto, T. Nagaoka, M. von Berg, E. et al. “Validation of Diesel Fuel Spray and Mixture Formation from Nozzle Internal Flow Calculation,” SAE Technical Paper 2005-01-2098 2005 10.4271/2005-01-2098
- Nagaoka, M. Ueda, R. Masuda, R. von Berg, E. Tatschl, R. 2008 “Modeling of Diesel Spray Atomization Linked with Internal Nozzle Flow” Proceedings of THIESEL 2008 Conference on Thermo- and Fluid Dynamic Processes in Diesel Engines
- Tatschl, R. Kadocsa, A. Kristof, G. 2006 “Modelling of Diesel Injection Process Using a Primary Breakup Approach” Proceedings of Conference on Modelling Fluid Flow (CMFF'06) Budapest
- Sato, Y. Sekoguchi, K. 1975 “Liquid velocity distribution in two-phase bubble flow” Int. J. Multiphase Flow 2 79
- Dukowicz, J. K. 1980 “A Particle-fluid numerical modes for liquid sprays” J. Comp. Physics 35 229 253 1980
- Reitz, R.D. 1987 “Modeling Atomization Processes in High-Pressure Vaporizing Sprays” Atomization and Spray Technology 3 309 337
- Baumgarten, C. 2006 “Mixture Formation in Internal Combustion Engines” Springer-Verlag Berlin
- Nordin, N. 2001 “Complex Chemistry Modeling of Diesel Spray Combustion” PhD Thesis Chalmers University
- Gosman, A.D. Ioannides, E. 1981 ‘Aspects of computer simulation of liquid-fuelled combustors’ AIAA 81 0323 1981 J. Energy 7 6 482 490 1983
- Tatschl, R. v. Künsberg Sarre, C. V. Berg, E. 2002 “IC-engine spray modeling - status and outlook” International Multidimensional Engine Modeling User's Group Meeting at the SAE Congress 2002
- von Berg, E. Edelbauer, W. Tatschl, R. Alajbegovic, A. Volmajer, M. Kegl, B. Ganippa, L. 2003 “Validation of a CFD Model for Coupled Simulation of Nozzle Flow, Primary Fuel Jet Break-up and Spray Formation” Proceedings of the 2003 Spring Technical Conference of the ASME Internal Combustion Engine Division May 11 14 2003 Salzburg, Austria
- Postrioti, L. Battistoni, M. Ungaro, C. Mariani, A. “Analysis of Diesel Spray Momentum Flux Spatial Distribution,” SAE Int. J. Engines 4 1 720 736 2011 10.4271/2011-01-0682
- Foschini, L. 2004 “Analisi numerica 1D di un sistema di iniezione Common Rail Bosch” MS Thesis University of Perugia
- Postrioti, L. Grimaldi, C. Bella, G. Ubertini, S. “Study of the Influence of the Injection System in a Multi-Dimensional Spray Simulation,” SAE Technical Paper 2005-24-088 2005 10.4271/2005-24-088
- Postrioti, L. Mariani, F. Battistoni, M. Mariani, A. “Experimental and Numerical Evaluation of Diesel Spray Momentum Flux,” SAE Int. J. Engines 2 2 287 299 2010 10.4271/2009-01-2772
- Postrioti, L. Battistoni, M. “Evaluation of Diesel Spray Momentum Flux in Transient Flow Conditions,” SAE Technical Paper 2010-01-2244 2010 10.4271/2010-01-2244
- Yuan, W. Hansen, A.C. Zhang, Q. 2005 “Vapor pressure and normal boiling point predictions for pure methyl esters and biodiesel fuels” Fuel 84 7-8 943 950
- Yuan, W. Hansen, A.C. Zhang, Q. 2009 “Predicting the temperature dependent viscosity of biodiesel fuels” Fuel 88 6 1120 1126
- Allen, C. A.W. Watts, K. C. Ackmanb, R. G. 1999 “Predicting the Surface Tension of Biodiesel Fuels from Their Fatty Acid Composition” Journal of the American Oil Chemists' Society 76 3 317 323