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Modelling Diesel Engine Natural Gas Injection: Injector/Cylinder Boundary Conditions
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Abstract
Direct injected natural gas diesel engines are currently being developed. Numerical analyses results are presented for 20.0 MPa (≈ 3000 psia; 200 atm), 444 K, natural gas injection into 4.0 MPa cylinder air where the ambient turbulence field is representative of diesel engines. Two very important non-intuitive, observations are made. First, the seemingly reasonable spatially uniform velocity profile currently used at the injector exit is not appropriate, rather a double-hump profile is correct. Second, a spatially uniform, injector exit, temperature profile results in local temperature overestimates as large as 300 K. Considering the strong role of temperature on chemical kinetics, this second observation may have profound implications on the validity of conclusions reached using uniform exit profiles.
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Citation
Zhang, J., Fraser, R., and Strong, A., "Modelling Diesel Engine Natural Gas Injection: Injector/Cylinder Boundary Conditions," SAE Technical Paper 940329, 1994, https://doi.org/10.4271/940329.Also In
References
- Fraser, R. A. Edwards C. J. Siebers D. L. “Autoignition of Methane and Natural Gas in a Simulated Diesel Environment,” SAE Paper No. 9102Z7 1991
- Jeske, F. R. Jennings M. J. Welch A. B. “Modeling of the Natural Gas Injection Process in a Two-Stroke Diesel Engine,” SAE Paper No. 920192 1992
- Ladommatos, N. Stone R. “Conversion of a Diesel Engine for Gaseous Fuel Operation at High Compression Ratio,” SAE Paper No. 910849 1991
- Karim. G. A. “On the Emission of Carbon Monoxide and Smoke from Compression Ignition Engines; Including Natural Gas Fueled Engines” Proceedings of 2nd Int. Clean Air Congress Academic Press 617 1970
- McJones, R. W. Corbeil, R. J. “Natural Gas Fueled Vehicles; Exhaust Emissions and Operational Characteristics” SAE Paper No. 700078 1970
- Abraham, J. Bracco F. V. “3-D Computations of Premixed-Charge Natural Gas Combustion in Rotary Engines,” SAE Paper No. 910625 1991
- Abraham, J. Bracco F. V. “Combustion Optimization Computations - Part I: Swirl and Squish Effects in Air Assist Injection Engines,” SAE Paper No. 922240 1992
- Gonzalez, M. A. Lian Z. W. Reitz R. D. “Modeling Diesel Engine Spray Vaporization and Combustion,” SAE Paper No. 920579 1992.
- Abramovich, G. N. The Theory of Turbulent Jets MIT Press Cambridge, Massachusetts 1963
- Tsang, G. Convective Motions in Fluids with Special Reference to Two-Dimensional Starting Plumes and Thermals in Neutral Surroundings University of Waterloo Waterloo, Ontario July 1968
- Abraham J. University of Minnesota September 1993
- Launder, B. E. Morse A. Rodi W. Spalding D. B. “Prediction of Free Shear Flows, A Comparison of the Performance of Six Turbulence Models” Free turbulent Shear Flows 1973
- Chen, C. J. Chen C. H. “On Prediction and Unified Correlation for Decay of Vertical Buoyant Jets” Transactions of the ASME 101 532 537 1979
- Abdel-Rahman, A. A. “An Experimental Investigation of A Buoyant Turbulent Plane Jet with Streamline Curvature” University of Waterloo 1987
- Zhang, J. F. Fraser R. A. Strong A. B. “Numerical Study of the Autoignition of Natural Gas in Diesel Engines: Use of Adaptive Griding,” Spring Technical Meeting of the Combustion Institute Canadian Section Quebec City, Quebec May 9-12 1993
- Zhang, J. F. Fraser R. A. Strong A. B. “Numerical Study of the Autoignition of Natural Gas in Diesel Engines: Code Development Phase,” Spring Technical Meeting of the Combustion Institute Canadian Section Edmonton, Alberta May 10-13 1992
- Anderson, J. D., Jr. Modern Compressible Flow With Historical Perspective 2nd McGraw-Hill Toronto 1990
- Ahmadi-Befrui, B. Gosman A. D. Watkins A. P. “Prediction of In-Cylinder Flow and Turbulence with three Versions of k-ε Turbulence Model and Comparison with Data,” Flows in Internal Combustion Engines - II ASME New York 27 37 1984
- El Tahry, S. H. “k-ε Equation for Compressible Reciprocating Engine Flows,” Journal of Energy 7 4 345 353 1983
- Chen, K. H. Pletcher R. H. “Primitive Variable, Strongly Implicit Calculation Procedure for Viscous Flows at All Speeds,” AIAA Journal 29 8 1241 1249 August 1991
- Karki, K. C. Patankar S. V. “Pressure Based Calculation Procedure for Viscous Flows at All Speed in Arbitrary Configurations,” AIAA Journal 27 9 1167 1174 September 1989
- Sheu, T. W. H. Lee S. M. Yang K. O. Chiou B. J. Y. “A Non-Oscillating Solution Technique for Skew Upwind and QUICK-Family Schemes,” Computational Mechanics 8 365 382 1991
- Hall, M. A Study of Velocities and Turbulence Intensities Measured in Firing and Motored Engines' Princeton University Princeton, New Jersey 1987
- Fraser, R. A. Bracco F. V. “Cycle-Resolved LDV Integral Length Scale Measurements Investigating Clearance Height Scaling, Isentropy, and Homogeneity in an I.C. Engine,” SAE Paper No. 890615 1992
- Hodgins, K. B. Hill P. G. Gunawan H. Tao Y. “Intensifier-Injector for Natural Gas Fueling of Diesel Engines,” The Combustion Institute Canadian Section 1992 Spring Technical Meeting Edmonton, Alberta May 11-13 1992
- Siebers, D. L. Edwards C. F. “Autoignition of Methanol and Ethanol Sprays under Diesel Engine Conditions,” SAE Transactions 96 5.140 5.152 1987
- White, F. M. Viscous Fluid Flow McGraw-Hill Toronto 1974
- Currie, I. G. Fundamental Mechanics of Fluids McGraw-Hill Toronto 1974
- Reynolds, W. C. Perkins H. C. Engineering Thermodynamics McGraw-Hill Toronto 1977
- Thompson, P. A. Compressible-Fluid Dynamics McGraw-Hill Toronto 1972
- Anderson, D. A. Tannehill J. C. Pletcher R. H. Computational Fluid Mechanics and Heat Transfer Hemisphere, New York 1984
- Bracco, F. V. “Modeling of Engine Sprays,” SAE Paper No. 850394 1985
- Williams, F. A. Combustion Theory Benjamin/Cummings Publishing Don Mills, Ontario 1985