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CFD Modeling of a Vortex Induced Stratification Combustion (VISC) System
Technical Paper
2004-01-0550
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper describes the CFD modeling work conducted for the development and research of a Vortex Induced Stratification Combustion (VISC) system that demonstrated superior fuel economy benefits. The Ford in-house CFD code and simulation methodology were employed. In the VISC concept a vortex forms on the outside of the wide cone angle spray and transports fuel vapor from the spray to the spark plug gap. A spray model for an outward-opening pintle injector used in the engine was developed, tested, and implemented in the code. Modeling proved to be effective for design optimization and analysis. The CFD simulations revealed important physical phenomena associated with the spray-guided combustion system mixing preparation. This paper presents the effect of various parameters such as piston shape, injector axial position, spark plug axial position, swirl control valve (SCV), exhaust gas recirculation (EGR) on mixture formation that affects the combustion, misfire rate, and stability in stratified-charge operation. A smoke correlation based on the amount of piston wetting and the amount of vapor in the rich regions will also be presented together with the effect of the piston shape, manifold absolute pressure (MAP), and split injection on smoke emissions in stratified-charge operation. The mixture preparation in homogeneous-charge operation in the current VISC system with a centrally mounted injector will be compared to the mixture preparation in a wall-guided system with a side-mounted injector.
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Iyer, C., Han, Z., and Yi, J., "CFD Modeling of a Vortex Induced Stratification Combustion (VISC) System," SAE Technical Paper 2004-01-0550, 2004, https://doi.org/10.4271/2004-01-0550.Also In
References
- Zhao F-Q., Lai M-C., and Harrington D.L., “A Review of Mixture Preparation and Combustion Control Strategies for Spark-Ignited Direct-Injection Gasoline Engines”, SAE Paper 970627, 1997.
- Kume T., Iwamoto Y., Iida K., Murakami M., Akishino K., and Ando H., “Combustion Control Technologies for Direct Injection SI Engine”, SAE Paper 960600, 1996.
- VanDerWege B. A., Han Z., Iyer C. O., Muñoz R. H., Yi J., “Development and Analysis of a Spray-Guided DISI Combustion System Concept”, Paper 03FFL-71, SAE Meeting, 2003.
- Amsden A.A., “KIVA-3V: A Block-Structured KIVA Program for Engines with Vertical or Canted Valves”, Los Alamos National Laboratory Report LA-13313-MS, 1997.
- Amsden A.A., “KIVA-3V, Release 2: Improvements to KIVA-3V”, Los Alamos National Laboratory Report LA-13608-MS, 1999.
- Han Z., Xu Z., and Trigui N., “Spray/Wall Interaction Models for Multidimensional Engine Simulation,” Int. J. of Engine Research, 1, 127-146, 2000.
- Iyer C.O. and Han Z., “Fuel Spray Modeling of Outward-Opening Pintle Injectors”, ILASS Americas, 15th Annual Conference on Liquid Atomization and Spray Systems, Madison, WI, May 2002.
- Han, Z., Parrish, S., Farell, P.V., and Reitz, R.D., “Modeling Atomization Process of Pressure Swirl Hollow-Cone Fuel Sprays”, Atomization and Sprays 7: 663-684, 1997.
- Han, Z., Xu, Z., Wooldridge, S.T., Yi J., and Lavoie, “Modeling of DISI Engine Sprays with Comparison to Experimental In-Cylinder Spray Images”, SAE 2001-01-3667, 2001.
- O'Rourke, P.J. and Amsden, A.A., “The TAB Method for Numerical Calculation of Spray Droplet Breakup”, SAE Paper 872089, 1987.
- Lefevbre, A.H., Atomization and Sprays, Hemisphere, New York, 1989.
- York, J.L., Stubbs, H.F., and Tek, M.R., Trans. ASME 75: 1279-1286, 1953.
- Rayleigh, Lord, Proc. London Math. Soc. 10: 4-13, 1878.
- Lambiris, S. and Combs, L.P., Detonation and Two Phase Flow, Prog. Astronaut Rocketry 6: 269-304, 1962.
- Han Z., Yi J., and Trigui N., “Stratified Mixture Formation and Piston Surface Wetting in a DISI Engine”, SAE paper 2002-01-2655, 2002.
- Yi J., Han Z., Yang J., Anderson R., Trigui N., and Boussarsar R., “Modeling of the Interaction of Intake Flow and Fuel Spray in DISI Engines,” SAE paper 2000-01-0656, 2000.
- Yi J., Han Z., and Trigui N., “Fuel-Air Mixing Homogeneity and Performance Improvements of a Stratified-Charge DISI Combustion System”, SAE 2002-01-2656, 2002.