This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Multidimensional Modeling of Spray Atomization and Air-Fuel Mixing in a Direct-Injection Spark-Ignition Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 24, 1997 by SAE International in United States
Annotation ability available
A numerical study of air-fuel mixing in a direct-injection spark-ignition engine was carried out. In this paper, the numerical models are described and grid generation methods to represent a realistic port-valve-chamber geometry is discussed. To model a vaporizing hollow-cone spray resulting from an automotive pressure-swirl injector, a newly developed sheet spray atomization model was used to compute the processes of disintegration of the liquid sheet and breakup of the subsequent drops. Computations were performed of a particular 4-valve pent-roof engine configuration in which the intake process and an early fuel injection scheme were considered. After an analysis of the intake-generated flow structures in this engine configuration, the spray behavior and the spatial and temporal evolution of fuel liquid and vapor phases are characterized. It was found that the intake-generated flow interacts with the injected spray drops which strongly influences fuel (both liquid and vapor phases) distributions and air-fuel mixing.
CitationHan, Z., Fan, L., and Reitz, R., "Multidimensional Modeling of Spray Atomization and Air-Fuel Mixing in a Direct-Injection Spark-Ignition Engine," SAE Technical Paper 970884, 1997, https://doi.org/10.4271/970884.
- Anderson, R. W., Yang, J., Brehob, D. D., Valiance, J. K., and Whiteaker, R. M. (1996). Understanding the Thermodynamics of Direct lnjection Spark lgnition (DISI) Combustion Systems: An Analytical and Experimental Investigation. SAE Paper 962018.
- Kume, T., Iwamoto, Y., lido, K., Murakami, M., Akishino, K., and Ando, H. (1996). Combustion Control Technologies for Direct lnjection SI Engine. SAE Paper 960600.
- Fraidl, G. K., Piock, W. F., and Wirth, M. (1996). Gasoline Direct Injection: Actual Trends and Future Strategies for lnjection and Combustion Systems. SAE Paper 960465.
- Simko, A. O., Choma, M. A., and Repko, L. L. (1972). Exhaust Emission Control by the Ford Programmed Combustion Process - PROCO. SAE Paper 720052.
- Scussel, A. J., Simko, A. O., and Wade, W. R. (1978). The Ford PROCO Engine Update. SAE Paper 780699.
- Alperstein, M., Schafer, G., and Villforth, F. (1974). Texaco's Stratified Charge Engine - Multifuel, Efficient, Clean and Practical. SAE Paper 740563.
- Han, Z., Reitz, R. D., Claybaker, P. J., Rutland, C. J., Yang, J., and Anderson, R. W. (1996). Modeling the Effects of lntake Flow Structures on Fuel/Air Mixing in a Direct-Injected Spark-Ignition Engine. SAE Paper 961192.
- Salters, D., Williams, P., Greig, A., and Brehob, D. (1996). Fuel spray characterization within an optically accessed gasoline direct injection engine using a CCD image system. SAE Paper 961149.
- Spiegel, L., and Spicher, U. (1992). Mixture Formation and Combustion in a Spark Ignition Engine with Direct Fuel Injection. SAE Paper 920521.
- Han, Z. (1996). Numerical Study of Air-Fuel Mixing in Direct-Injection Sprak-Ignition and Diesel Engines. Ph. D. Thesis, University of Wisconsion-Madison.
- Amsden, A. A. (1993). KIVA-3: A KlVA Program with Block-Structured Mesh for Complex Geometries. Los Alamos National Labs., LA-12503-MS.
- Han, Z., and Reitz, R. D. (1995). Turbulence Modeling of Internal Combustion Engines Using RNG k-ε Models. Comb. Sci. Tech. 106, 207.
- Han, Z., and Reitz, R. D. (1996). A Temperature Wall Function Formulation for Variable-Density Turbulent Flows with Application to Engine Convective Heat Transfer Modeling. Int. J. Heat Mass Transfer, in press.
- Han, Z., Parrish, S. E., Farrell, P. V., and Reitz, R. D. (1996). Modeling Atomization Processes of Pressure-Swirl Hollow-Cone Fuel Sprays. Submitted to Atomization and Sprays.
- Dukowicz, J. K. (1980). A Particle-Fluid Numerical Model for Liquid Sprays. Journal of Computational Physics. 35, 229.
- Lefebvre, A. H. (1989). Atomization and Sprays, Hemisphere Publishing Corp., New York.
- Rizk, N. K., and Lefebvre, A. H. (1985). lnternal Flow Characteristics of Simplex Swirl Atomizers. AIAA. J. Propul. Power, 1, 193.
- Clark, C. J., and Dombrowski, N. (1972). Aerodynamic Instability and Disintegration of lnviscid Liquid Sheets. Proc. Roy. Soc. Lond. A. 329, 467.
- O'Rourke, P. J., and Amsden, A. A. (1987). The TAB Method for Numerical Calculation of Spray Droplet Breakup. SAE Paper 872089.
- Naber, J., and Reitz, R. D. (1988). Modeling Engine Spray/Wall Impingement. SAE Paper 880107.
- Amsden, A. A. (1996). Private communication.
- Hessel, R. P., and Rutland, C. J. (1993). Intake Flow Modeling in a Four Stroke Diesel Using KIVA3. AIAA Paper 93-2952.
- Meintjes, K. (1996). Private communication.
- Backer, W. B. (1996). Planar Laser Techniques for Determining In-Cylinder Mixing Rates. MS thesis, University of Wisconsin-Madison, in preparation.
- Reitz, R. D. and Kuo, T. W. (1989). Modeling of HC Emissions due to Crevice Flows in Premixed-Charge Engines. SAE Paper 892085.
- Obert, E. F. (1973). lnternal Combustion Engines and Air Pollution. Harper & Row, New York.
- Parrish, S. E. (1996). Spray Characteristics of a Direct-Injection Spark-Ignited Engine. Ph.D. Thesis, University of Wisconsin-Madison, in preparation.
- Han, Z., Reitz, R. D., Yang, J, and Anderson, R. W. (1997). Effects of lnjection Timing on Air-Fuel Mixing in a Direct-Injection Spark-Ignition Engine. SAE Paper 970625.
- Eckhause, J. E., and Reitz, R. D. (1995). Modeling Heat Transfer to Impinging Fuel Sprays in Direct lnjection Engines. Atomization and Spray Technology. 5, 1 .
- Liu, Z., and Reitz, R. D. (1995). Modeling Fuel Spray Impingement and Heat Transfer Between Spray and Wall in D.I. Diesel Engines. Numerical Heat Transfer, Part A, 28.