Large-scale flows in internal combustion engines directly affect combustion duration and emission production. The effect of intake port geometry on combustion performance was studied in a four-stroke spark-ignition utility engine. Three intake port geometries were investigated at three port orientations. In-cylinder flows in orthogonal planes were measured using particle image velocimetry (PIV). The PIV data were processed to calculate the large-scale mean vorticity and mean high-pass filtered velocity. Combustion performance data were separately acquired at two load conditions at a fixed equivalence ratio, and compared with the PIV data. The cumulative distribution functions of the flow parameters did not show significant port-to-port differences in either measurement plane. The mean vorticity and high-pass filtered velocity did exhibit differences due to port orientation in the horizontal plane, but not in the vertical plane. The 0 deg ports (tangential orientation) consistently produced the highest values of large-scale mean vorticity and mean high-pass filtered velocity in the horizontal plane. The kinetic energy present at ignition was also calculated to characterize the flow. The ensemble-averaged values of the mean large-scale vorticity, high-pass filtered velocity, and kinetic energy were compared to the combustion duration. The vertical-plane vorticity and high-pass filtered velocity did not correlate with combustion performance. The horizontal-plane vorticity and high-pass filtered velocity were found to exhibit modest correlation at the fixed torque condition, and somewhat lower correlation at the wide open throttle condition. The correlation between kinetic energy and combustion duration was poor. The best correlation of flow field structure with engine performance was achieved for ports at the 0 deg port orientation. Ports at this orientation generated coherent, large-scale swirl.
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Particle Image Velocimetry Measurements of In-Cylinder Flow in a Four-Stroke Utility Engine and Correlation With Combustion Measurements
Karen E. Bevan,
Karen E. Bevan
Eaton Corporation
, 26201 Northwestern Highway, Southfield, MI 48037
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Jaal B. Ghandhi
Jaal B. Ghandhi
125 Engineering Research Building 1500 Engineering Drive Madison, WI 53706–1687
Search for other works by this author on:
Karen E. Bevan
Eaton Corporation
, 26201 Northwestern Highway, Southfield, MI 48037
Jaal B. Ghandhi
125 Engineering Research Building 1500 Engineering Drive Madison, WI 53706–1687
J. Eng. Gas Turbines Power. May 2008, 130(3): 032802 (11 pages)
Published Online: March 26, 2008
Article history
Received:
August 4, 2005
Revised:
October 23, 2007
Published:
March 26, 2008
Citation
Bevan, K. E., and Ghandhi, J. B. (March 26, 2008). "Particle Image Velocimetry Measurements of In-Cylinder Flow in a Four-Stroke Utility Engine and Correlation With Combustion Measurements." ASME. J. Eng. Gas Turbines Power. May 2008; 130(3): 032802. https://doi.org/10.1115/1.2830547
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