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Optimum Fin Layout of Air-Cooled Engine Cylinder in Air Stream
Technical Paper
2006-01-1229
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
It is important for an air-cooled engine to utilize fins with effective engine cooling and uniform temperature in the cylinder circumference. In order to permit the development of design data, an experimental cylinder was developed having variable fin pitch and number of fin capability. This experimental cylinder was tested in a wind tunnel. Experimental cylinders with five different fin pitches and twelve different numbers of fins were investigated over a range of air velocity between 0 and 60 km/h. The temperature inside the cylinder and on the fin surface was measured to determine the heat release from the cylinder and the fin surface heat transfer coefficient respectively. To understand the operation of cooling fins for each fin pitch, number of fins, and air speed, the temperature in the space between the fins was measured and the air flow between them was observed with a high-speed video camera using the smoke wire method. As a consequence, this experimentation clarified the fin pitch and number of fins required to provide more effective cooling. In addition, fin pitch was found to be important in improving cooling, especially in a lower air velocity. The expression of average fin surface heat transfer coefficient derived from fin pitch and air velocity was developed. This expression can be utilized to predict the improvement of cooling in the fin design process.
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Citation
Yoshida, M., Ishihara, S., Murakami, Y., Nakashima, K. et al., "Optimum Fin Layout of Air-Cooled Engine Cylinder in Air Stream," SAE Technical Paper 2006-01-1229, 2006, https://doi.org/10.4271/2006-01-1229.Also In
SAE 2006 Transactions Journal of Passenger Cars: Mechanical Systems
Number: V115-6; Published: 2007-03-30
Number: V115-6; Published: 2007-03-30
References
- Yoshida, M. Ishihara, S. Nakashima, K. Yamamoto, M. Development of Air-Cooled Cylinder by Utilizing Natural Convection SAE Paper No. 2005-01-1385 2005
- Gibson, A. H. The Air Cooling of Petrol Engines Proceedings of the Institute of Automobile Engineers XIV 243 275 1920
- Biermann, A. E. Pinkel, B. Heat Transfer from Finned Metal Cylinders in an Air Stream NACA Report No. 488 1935
- Thornhill, D. May, A. An Experimental Investigation into the Cooling of Finned Metal Cylinders, in a Free Air Stream SAE Paper No. 1999-01-3307 1999
- Thornhill, D. Graham, A. Cunnigham, G. Troxier, P. Meyer, R. Experimental Investigation into the Free Air-Cooling of Air-Cooled Cylinders SAE Paper No. 2003-32-0034 2003
- Schey, O. W. Biermann, A. E. Heat Dissipation from a Finned Cylinder at Different Fin-Plane / Air-Stream Angles NACA Technical Notes No. 429 1932
- Schey, O. W. Rollin, V. G. The Effect of Baffles on the Temperature Distribution and Heat-Transfer Coefficients of Finned Cylinders NACA Report No. 511 1936
- Biermann, A. E. Heat Transfer from Cylinders Having Closely Spaced Fins NACA Technical Notes No. 602 1937
- Brevoort, M. J. Rollin, V.G. Air Flow around Finned Cylinders NACA Report No.555 1937
- Ellerbrock, H. H. Biermann, A. E. Surface Heat-Transfer Coefficients of Finned Cylinders NACA Report No. 676 1939
- Biermann, A. E. Ellerbrock, H. H. The Design of Fins for Air-Cooled Cylinders NACA Report No. 726 1941
- Pai, B. U. Samaga, B. S. Mahadevan, K. Some Experimental Studies of Heat Transfer from Finned Cylinders of Air-Cooled I. C. Engines 4 th National Heat Mass Transfer Conference 137 144 1977
- Nabemoto, A. Chiba, T. Flow over Fin Surfaces of Fin Tubes Bulletin of the Faculty of Engineering Hiroshima University 33 2 117 125 1985
- Nabemoto, A. Heat Transfer on a Fin of Fin Tube Bulletin of the Faculty of Engineering Hiroshima University 33 2 127 136 1985