This content is not included in your SAE MOBILUS subscription, or you are not logged in.
PIV Measurements of In-Cylinder Flow in a Four-Stroke Utility Engine and Correlation with Steady Flow Results
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 27, 2004 by SAE International in United States
Annotation ability available
Large-scale flows in internal combustion engines directly affect combustion duration and emissions production. These benefits are significant given increasingly stringent emissions and fuel economy requirements. Recent efforts by engine manufacturers to improve in-cylinder flows have focused on the design of specially shaped intake ports. Utility engine manufacturers are limited to simple intake port geometries to reduce the complexity of casting and cost of manufacturing. These constraints create unique flow physics in the engine cylinder in comparison to automotive engines.
An experimental study of intake-generated flows was conducted in a four-stroke spark-ignition utility engine. Steady flow and in-cylinder flow measurements were made using three simple intake port geometries at three port orientations. Steady flow measurements were performed to characterize the swirl and tumble-generating capability of the intake ports. In-cylinder flows were investigated using Particle Image Velocimetry (PIV). Two-dimensional PIV measurements were made in a vertical plane and a horizontal plane of the cylinder with the engine motored at 1200 RPM. The steady flow swirl and tumble characteristics were similar for the three port geometries, but differed significantly with port orientation. The swirl direction and magnitude measured on the steady flow bench correlated well qualitatively with the ensemble-averaged velocity distributions in the horizontal PIV plane.
The PIV results showed that the in-cylinder flows generated by the three ports were complex, three-dimensional flows with no dominant large-scale fluid motion. Significant cycle-to-cycle variation was observed in the flow field. The orientation of the intake port was also shown to have a significant effect on the flow field.
|Technical Paper||Robust Engine Design Using Engine Simulations|
|Journal Article||High Injection Pressures at the Upper Load Limit of Stratified Operation in a DISI Engine|
|Technical Paper||Heavy-Duty Diesel Engines to Meet Japanese Nltr|
CitationBevan, K. and Ghandhi, J., "PIV Measurements of In-Cylinder Flow in a Four-Stroke Utility Engine and Correlation with Steady Flow Results," SAE Technical Paper 2004-32-0005, 2004, https://doi.org/10.4271/2004-32-0005.
- Arcoumanis, C. Hu, Z. Vafidis, C. Whitelaw, J.H. “Tumbling Motion: A Mechanism for Turbulence Enhancement in Spark-Ignition Engines,” SAE paper 900060 1990
- Nino, E. Gajdeczko, B.F. Felton, P.G. “Two Color Particle Image Velocimetry in an Engine With Combustion,” SAE paper 930872 1993
- Kent, J.C. Mikulec, A. Rimal, L. Adamczyk, A.A. Mueller, S.R. Stein, R.A. Warren, C.C. “Observations on the Effects of Intake-Generated Swirl and Tumble on Combustion Duration,” SAE paper 892096 1989
- Patrie, M.P. “Particle Image Velocimetry Measurements of In-Cylinder Flows and Correlation with Engine Performance,” Mechanical Engineering Department University of Wisconsin-Madison 1998
- Bracco, F.V. “Structure of Flames in Premixed-Charge IC Engines,” Combustion Science and Technology 58 209 230 1988
- Schalkoff, R.J. “Digital Image Processing and Computer Vision,” Wiley 1989
- Christenson, K.T. Soloff, S.M. “PIV Sleuth: Integrated Particle Image Velocimetry (PIV) Acquisition/Interrogation/Validation Software,” Urbana 1999
- Heywood, J.B. “Internal Combustion Engine Fundamentals,” McGraw-Hill, Inc. 1988
- Bottom, K.E. “PIV Measurements of In-Cylinder Flow and Correlation with Engine Performance,” Mechanical Engineering Department University of Wisconsin-Madison 2003