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Method of Scavenging Analysis for 2-Stroke-Cycle Diesel Cylinders
ISSN: 0148-7191, e-ISSN: 2688-3627
Published January 01, 1955 by SAE International in United States
Annotation ability available
HOW to go about improving scavenging efficiency in 2-stroke-cycle diesel engines through use of a static method of analysis is discussed here. Briefly, the steps are:
Determine airflow pattern in the existing cylinder design by means of instrumentation, and find the synthetic scavenging efficiency by plotting axial and tangential velocity components.
Decide what should be improved and the method of accomplishing this improvement, such as using a different port shape and angle.
Test the new design on the flow bench and compare with the original design for scavenging efficiency, tangential velocity distribution, and pressure drop.
Test the improved design in the engine.
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CitationPercival, W., "Method of Scavenging Analysis for 2-Stroke-Cycle Diesel Cylinders," SAE Technical Paper 550291, 1955, https://doi.org/10.4271/550291.
- See SAE Transactions, Vol. 62, 1954, pp. 486–502: “Scavenging the 2-Stroke Engine,” by Taylor C. F. and Rogowski A. R.
- See “Scavenging of 2-Stroke-Cycle Diesel Engines,” by Schweitzer P. H. Pub. by Macmillan, New York, 1949.
- See NACA TM 969 (1941), “Experiences with Flow Direction Instruments,” by Eckert B.
- See SAE Quarterly Transactions, Vol. 2, January, 1948, pp. 104–116: “Instrumentation for Development of Aircraft Powerplant Components Involving Fluid Flow,” by Markowski S. J. and Moffatt E. M.
- See VDI Zeitschrift, Vol. 82, Jan. 8, 1938, pp. 52–53: “Spherical Probe of Small Diameter for Pressure and Velocity Measurements,” by Strauss K.
- See NACA TM 688 (1932), “Speed and Pressure Recording in Three-Dimensional Flow,” by Krisam F.
- “Cyclone Dust Collector Design,” by First Melvin W. Paper No. 49-A-127 for meeting Nov. 27–Dec. 2, 1949.
- See “Investigations Concerning Scavenging of 2-Stroke-Cycle Engines,” by Lutz Otto Pub. by K. Wittwer, Stuttgart, Germany, 1931.
- See footnote 1 of main paper.
- “Scavenging Study for Uniflow Engines.” by Sobel John A. III. Peunsylvania State University thesis for master's degree, August, 1953.