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Flowbench Calibration of a Numerical Model for a Novel Uniflow-Scavenged Two-Stroke GDI Engine
Technical Paper
2006-01-3268
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The development of a uniflow-scavenged two-stroke engine is in progress at Queen's University, Canada. This novel engine has a unique cylinder head design that contains an array of check valves to control the airflow into the cylinder. Since the intake airflow is of great importance to engine performance, a detailed investigation is required. A numerical model created with Fluent 6.2 was used to simulate the airflow through the cylinder head in the effort to understand the flow and ultimately improve the head design. At the same time a flowbench test was performed to obtain steady flow data used to calculate a flow coefficient associated with the airflow through the cylinder head. The experimental flowbench data also provides a useful tool to validate the numerical model. Thus, this paper presents the development and verification of a numerical model that simulates airflow through the cylinder head. Mass flow rates and flow coefficients derived both experimentally and by simulation are presented. The numerical model predicts the flow coefficient to within approximately 10%. Discrepancies may exist due to the improper prediction of the spreading rate of the jets which influences the interaction of the jets with each other and the confining wall.
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Oliver, P., Reynolds, S., and Ciccarelli, G., "Flowbench Calibration of a Numerical Model for a Novel Uniflow-Scavenged Two-Stroke GDI Engine," SAE Technical Paper 2006-01-3268, 2006, https://doi.org/10.4271/2006-01-3268.Also In
References
- Ohlmann, D. Reynolds, S. Ciccarelli, G. “Development of a Novel Uniflow-Scavenged Two- Stroke GDI Engine,” SAE Paper 2006-01-0187 2006
- Xu, H. “Some Critical Technical Issues on the Steady Flow Testing of Cylinder Heads,” SAE Paper 2001-01-1308 2001
- Heywood, J. B. Internal Combustion Engine Fundamentals McGraw-Hill 1988
- Fleck, B. J. Fleck, R. Kee, R. J. Thornhill, D. J. “The Evaluation of Discharge Coefficients in the Cylinders of High Performance Two-Stroke Engines,” SAE Paper 2003-32-0029 2003
- Rival, D. Ciccarelli, G. “Evaluation of Scavenging Performance in a Novel Two-Stroke GDI Engine,” SAE Paper 2006-01-0446 2006
- Fluent Inc. Fluent 6.2 User's Guide Fluent Inc. 2005
- Nallasamy, M. “Turbulence Models and their Applications to the Prediction of Internal Flows: A Review” Computers & Fluids 15 2 151 194 1987
- Pope, S. B. “An Explanation of the Turbulent Round-Jet/Plane-Jet Anomaly” AIAA Journal 16 3 279 281 1978
- Thobois, L. Rymer, G. Souleres, T. Poinsot, T. Van den Heuvel, B. “Large-eddy simulation for the prediction of aerodynamics in IC engines” International Journal Of Vehicle Design 39 4 368 382 2005
- Launder, B. E. Rodi, W. “The Turbulent Wall Jet - Measurements and Modeling” Annual Review of Fluid Mechanics 15 429 459 1983
- Pope, S. B. Turbulent Flows 3rd Cambridge Press 2000
- Nasr, A. Lai, J. C. S. “Comparison of Flow Characteristics in the Near Field of Two Parallel Plane Jets and an Offset Plane Jet” Physics of Fluids 9 10 2919 2931 1997
- Yimer, I. Becker, H. A. Grandmaison, E. W. “Development of Flow from Multiple-Jet Burners” Canadian Journal of Chemical Engineering 74 840 850 1996
- Blevins, R. D. Applied Fluid Dynamics Handbook 1st Van Nostrand Reinhold Company Inc. 1984
- Gutmark, E. J. Grinstein, F. F. “Flow Control with Noncircular Jets” Annual Review of Fluid Mechanics 31 239 72 1999