A Steady-State Air Motion Study in a V-6 Uniflow Scavenged Two-Stroke Diesel Engine

[+] Author and Article Information
T. D. Doan, E. F. Crawford, S. J. Hinkle

Detroit Diesel Allison Division, General Motors Corporation, Detroit, MI 48239

J. Eng. Gas Turbines Power 110(3), 503-508 (Jul 01, 1988) (6 pages) doi:10.1115/1.3240163 History: Received March 01, 1987; Online October 15, 2009


This paper presents new insight into the causes of cylinder-to-cylinder variation in swirl torque and airflow in uniflow scavenged, two-stroke diesel engines. A V-6 model of such an engine was investigated as a flow rig under steady-state conditions. These variations were found to be primarily caused by the effect of the airbox walls on the air motion. The maximum difference in the baseline cylinder-to-cylinder swirl torque and airflow rate was 11 and 3.5 percent, respectively. Two airbox design modifications, resulting from the study, in turn demonstrated increased cylinder airflow rate and reduced cylinder-to-cylinder swirl torque variation on the flow rig.

Copyright © 1988 by ASME
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