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A Study on the Influnce of Intel Angel and Reynolds Number on the Flow-Pattern of Uniflow Scavenging Air
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Abstract
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.
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Citation
Nishimoto, 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.Also In
References
- Hamabe G. Sasaki T. “Study on the Scavenging Process of Two-Stroke Cycle Engines” (3rd Report), Trans. JSME 3 13 1937 85
- Tomizuka K. Yokohori T. “Studies on the Scavenging Process of Uniflow Two-Stroke Cycle Engines” Jour. of the Aeronautical Research Institute, Tokyo Imperial Univ. 1st Report 231 1943 320 2nd Report 234 1944 25 3rd Report 239 1944 209 4th Report 239 1944 223
- Percival W.H. “Method of Scavenging Analysis for Two-Stroke Cycle Diesel Cylinders” SAE Trans. 63 1955 737
- Ohigashi S. Kashiwada Y. Achiba J. “Study on the Scavenging of Two-Stroke Cycle Diesel Engines” Trans. JSME 25 156 1959 827
- Koizumi I. “Some Problems on Exhaust and Scavenging Phenomena of Diesel Engines” Jour, of the Faculty of Engineering, Univ. of Tokyo B 31 3 1972 445
- Ishii T. Fujimura K. Noguchi Y. Hashimoto M. “The Relation Between Scavenging and Combustion Behaviors of the Two-Stroke Diesel Engine” Nainen Kikan 12 144 1973 11
- Sarpkaya T. “On Stationary and Travelling Vortex Breakdowns” Jour, of Fluid Mech. 45 1971 545
- Sarpkaya T. “Vortex Breakdown in Swirling Conical Flows” Jour. of AIAA 9 9 1971 1792
- Sarpkaya T. “Effect of the Adverse Pressure Gradient on Vortex Breakdown” Jour. of AIAA 12 5 1974 602
- Harvey J.K. “Some Observation of the Vortex Breakdown Phenomenon” Jour. of Fluid Mech. 14 4 1962 585
- Faler J.H. Leibovich S. “An Experimental Map of the Internal Structure of a Vortex Breakdown” Jour. of Fluid Mech. 86 1978 313
- Ikeda T. Sakata M. Kikuchi K. “An Experimental Study on Vortex Breakdown in Straight and Divergent Pipes” Jour. of the Faculty of Engineering, Shinshu Univ. 36 1974 1
- Nakamura Y. Nakamura H. Suehiro F. Tsuboi K. Uchida S. “Experiments on Vortex Breakdown of the Swirling Pipe Flow by the Use of Laser-Doppler Velocimeter” Jour. of Japan Soc. for Aeronautics and Space Sciences 25 287 1977 588