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Method of Scavenging Analysis for 2-Stroke-Cycle Diesel Cylinders
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English
Abstract
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:
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1.
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.
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2.
Decide what should be improved and the method of accomplishing this improvement, such as using a different port shape and angle.
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3.
Test the new design on the flow bench and compare with the original design for scavenging efficiency, tangential velocity distribution, and pressure drop.
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4.
Test the improved design in the engine.
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Citation
Percival, W., "Method of Scavenging Analysis for 2-Stroke-Cycle Diesel Cylinders," SAE Technical Paper 550291, 1955, https://doi.org/10.4271/550291.Also In
References
- SAE Transactions Vol. 62 1954 486 502 “Scavenging the 2-Stroke Engine,” Taylor C. F. Rogowski A. R.
- “Scavenging of 2-Stroke-Cycle Diesel Engines,” Schweitzer P. H. Macmillan New York 1949
- NACA TM 969 1941 “Experiences with Flow Direction Instruments,” Eckert B.
- SAE Quarterly Transactions Vol. 2 January 1948 104 116 “Instrumentation for Development of Aircraft Powerplant Components Involving Fluid Flow,” Markowski S. J. Moffatt E. M.
- VDI Zeitschrift Vol. 82 Jan. 8 1938 52 53 “Spherical Probe of Small Diameter for Pressure and Velocity Measurements,” Strauss K.
- NACA TM 688 1932 “Speed and Pressure Recording in Three-Dimensional Flow,” Krisam F.
- “Cyclone Dust Collector Design,” First Melvin W. Paper No. 49-A-127 for meeting Nov. 27–Dec. 2 1949
- “Investigations Concerning Scavenging of 2-Stroke-Cycle Engines,” Lutz Otto K. Wittwer, Stuttgart Germany 1931
- “Scavenging Study for Uniflow Engines.” Sobel John A. III. August 1953