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CFD Analysis of Air Flow of Air-cooled Motorcycle Engines
Technical Paper
2006-32-0005
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
In the development of an air-cooled engine, cooling air flow was analyzed by CFD. Cooling performance of the engine is necessary for precise temperature control. However, stable radiation is difficult for motorcycles because of the effects of driving wind. Cooling fins are thin and complicated; therefore plenty of time and effort is necessary to create a boundary fitted mesh. In addition, since low Reynolds (Re) number areas coexists with high Re number areas in a calculation domain, applications of the wall function are limited. Therefore, we employ the Partial Cells in Cartesian coordinate method, which expresses complex shapes according to turbulence boundary conditions in the Cartesian coordinate. Analysis results show good agreement with test results in a wind tunnel. Furthermore, useful knowledge in engine development was obtained by examination of local heat transfer coefficients calculated by Karman's analogy.
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Citation
Takahashi, Y. and Gokan, Y., "CFD Analysis of Air Flow of Air-cooled Motorcycle Engines," SAE Technical Paper 2006-32-0005, 2006, https://doi.org/10.4271/2006-32-0005.Also In
References
- Yasushi Takahashi Kazuto Fukuzawa Isao Fujii “Numerical simulation of flow in intake ports and cylinder of multi-valve S.I. engine using PCC method,” Proceedings of International Symposium on COMODIA 94 529 534 1994
- Yasushi Takahashi Tomokazu Nomura Tuneaki Ishima Tomio Obokata “Numerical analysis on steady state in-cylinder-flow by Partial Cells in Cartesian Coordinate method and verification with PIV measurement,” Transactions of the Japan Society of Mechanical Engineers, Series B 71 706 1694 1701 2005
- 3DataExpert http://www.deskartes.com 2006 1 16
- Fujio Tachibana Mamoru Akiyama Yoshizo Okamoto Teruo Morishita Fundamentals of Heat Transmission Colona, Tokyo 1965 44