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Development and Validation of a Comprehensive CFD Model of Diesel Spray Atomization Accounting for High Weber Numbers
Technical Paper
2006-01-1546
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Modern diesel engines operate under injection pressures varying from 30 to 200 MPa and employ combinations of very early and conventional injection timings to achieve partially homogeneous mixtures. The variety of injection and cylinder pressures results in droplet atomization under a wide range of Weber numbers. The high injection velocities lead to fast jet disintegration and secondary droplet atomization under shear and catastrophic breakup mechanisms. The primary atomization of the liquid jet is modeled considering the effects of both infinitesimal wave growth on the jet surface and jet turbulence. Modeling of the secondary atomization is based on a combination of a drop fragmentation analysis and a boundary layer stripping mechanism of the resulting fragments for high Weber numbers. The drop fragmentation process is predicted from instability considerations on the surface of the liquid drop. Validation of the model has been performed by comparing the computational results with experimental measurements from isolated drops in shock tube experiments as well as with observations from fully developed diesel sprays.
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Chryssakis, C., Assanis, D., and Bae, C., "Development and Validation of a Comprehensive CFD Model of Diesel Spray Atomization Accounting for High Weber Numbers," SAE Technical Paper 2006-01-1546, 2006, https://doi.org/10.4271/2006-01-1546.Also In
References
- Faeth, G.M. Hsiang, L.-P. Wu, P.-K. “Structure and Breakup Properties of Sprays” Int. J. Multiphase Flow 21 99 127 1995
- Reitz, R.D. “Modeling Atomization Processes in High-Pressure Vaporizing Sprays” Atomization and Sprays Technology 3 309 337 1987
- Reitz, R.D. Diwakar, R. “Structure of High-Pressure Fuel Sprays” SAE Technical Paper Series 870598 1987
- Patterson, M.A. Reitz, R.D. “Modeling the Effects of Fuel Spray Characteristics on Diesel Engine Combustion and Emission” SAE 980131 1998
- O'Rourke, P.J. Amsden, A.A. “The TAB Method for Numerical Calculation of Spray Droplet Breakup” SAE 872089 1987
- Reitz, R.D. Bracco, F.V. “On the Dependence of Spray Angles and Other Spray Parameters on Nozzle Design and Operating Conditions” SAE 790494 1979
- Huh, K.Y. Lee, E. Koo, J.-Y. “Diesel Spray Atomization Model Considering Nozzle Exit Turbulence Conditions” Atomization and Sprays 8 453 469 1998
- Amsden A.A. “KIVA-3V: A Block-Structured KIVA Program for Engines with Vertical or Canted Valves” Los Alamos National Laboratory LA-13313-MS July 1997
- Munson, B.R. Young, D.F. Okiishi, T.H. Fundamentals of Fluid Mechanics 2nd John Wiley & Sons 1994
- Hsiang, L.-P. Faeth, G.M. “Near-Limit Drop Deformation and Secondary Breakup” Int. J. Multiphase Flow 18 5 635 652 1992
- Aalburg, C. van Leer, B. Faeth, G.M. “Deformation and Drag Properties of Round Drops Subjected to shock Wave Disturbances” AIAA Journal 41 12 December 2003
- Clift, R. Grace, J.R. Weber, M.E. Bubbles, Drops and Particles Academic Press 1978
- Hinze, J.O. “Fundamentals of the Hydrodynamic Mechanism of Splitting in Dispersion Processes” AIChE 1 289 295 1955
- Ranger, A.A. Nichols, J.A. “Aerodynamic Shattering of Liquid Drops” AIAA 7 285 290 1969
- Krzeczkowski, S.A. “Measurement of Liquid Droplet Disintegration Mechanisms” Int. J. Multiphase Flow 6 227 239 1980
- Gelfand, B.E. “Droplet Breakup Phenomena in Flows with Velocity Lag” Prog. Energy Combust. Sci. 22 201 265 1996
- Pilch M. Erdman C.A. “Use of Breakup Time Data and Velocity History Data to Predict the Maximum Size of Stable Fragments for Acceleration-Induced Breakup of a Liquid Drop” Int. J. Multiphase Flow 13 6 741 757 1987
- Hsiang L.-P. Faeth, G.M. “Drop Properties after Secondary Breakup” Int. J. Multiphase Flow 19 5 721 735 1993
- Faeth G.M. “Dynamics of Secondary Drop Breakup - A Rate Controlling Process in Dense Sprays” Invited review article, ILASS-Europe 2002 Zaragoza, Spain 9-11 September 2002
- Chou, W.-H. Faeth, G.M. “Temporal Properties of Secondary Drop Breakup in the Bag Breakup Regime” Int. J. Multiphase Flow 24 889 912 1998
- Chou, W.-H. Hsiang, L.-P. Faeth, G.M. “Temporal Properties of Drop Breakup in the Shear Breakup Regime” Int. J. Multiphase Flow 23 4 651 669 1997
- Fishburn, B.D. “Boundary Layer Stripping of Liquid Drops Fragmented by Taylor Instability” Acta Astronautica 1 1267 1284 Pergamon Press 1974
- Schlichting, H. Boundary Layer Theory 6th McGraw-Hill 1968
- Taylor, G.I. “The Instability of Liquid Surfaces when Accelerated in a Direction Perpendicular to their Planes” Proc. Royal Soc. A. 201 192 196 1950
- Habchi, C. Verhoeven, D. Huynh Huu, C. Lambert, L. Vanhemelryck, J.L. Baritaud, T. “Modeling Atomization and Break Up in High-Pressure Diesel Sprays” SAE 970881 1997
- Kang, J. Bae, C. Lee, K.O. “Initial Development of Non-Evaporating Diesel Sprays in Common Rail Injection Systems” Int. J. Engine Research 4 4 283 298 2003