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A Study on the Influnce of Intel Angel and Reynolds Number on the Flow-Pattern of Uniflow Scavenging Air
ISSN: 0148-7191, e-ISSN: 2688-3627
Published August 01, 1984 by SAE International in United States
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A cylinder of a model uniflow scavenging engine filled with air at room temperature was scavenged with hot air, and arrival time of the scavenging air was detected with a thermocouple at 20 positions in the cylinder. And shape of front surface of the scavenging air was obtained from these data: The front surface with medium intensity swirl port has a peak in the central part at low running speed, but as the speed increases, it becomes flat causing scavenging efficiency the highest. And finally, a depression appears at its center at very high running speed. Assuming this phenomenon to be analogous to “vortex breakdown” investigated by T.Sarpkaya and others, the authors have proposed a method to determine a geometry of scavenging port that gives the highest scavenging efficiency at a desired Reynolds number, and verified its availability.
CitationNishimoto, K. and Kamimoto, T., "A Study on the Influnce of Intel Angel and Reynolds Number on the Flow-Pattern of Uniflow Scavenging Air," SAE Technical Paper 841056, 1984, https://doi.org/10.4271/841056.
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