https://scholars.lib.ntu.edu.tw/handle/123456789/611963
標題: | Experimental investigation of lubrication and cooling effects of high-speed rotating machines | 作者: | Tzeng S.-C. Ma W.-P. Lin C.-W. Jywe W.-Y. Liu C.-H. Wang Y.-C. Wen-Yuh Jywe |
關鍵字: | Buoyancy;Cooling systems;Reynolds number;Thermal expansion;Cooling effects;High speed rotating machines;Rotating cylinders;Rotating machining tools;Lubrication | 公開日期: | 2007 | 卷: | 35 | 期: | 3-4 | 起(迄)頁: | 394-399 | 來源出版物: | International Journal of Advanced Manufacturing Technology | 摘要: | This study discusses the lubrication and cooling effects of high-speed rotating machines. The optimal channel design of the rotating test section with ribs will enhance cooling purposes. Therefore, the negative effects of thermal expansion and distortion of rotating elements are inhibited, thus decreasing the damage percentage of rotating machining tools, and improving processing precision and efficiency. To analyze the cooling behavior of the working fluid, the experimental conditions are required to fit the practical operating parameters of the high-speed rotating shaft. The experimental test analyzes axial and radial local Nusselt number distribution of the test section of the high-speed rotating cylinder. The experimental results show that Rib 4 case provides the best performance on the cooling area, showing a 20-40% removal of heat compared to that of the smooth wall. Given various fluid velocities (Reynolds number, Re) and buoyancy parameters (Grashof number, Gr), Rib 4 also achieves the highest cooling rate. Furthermore, we found that the larger the Re and Gr are, the larger cooling efficiency is. In conclusion, the experimental results provide some useful reference data for similar high-speed rotating lubrication and cooling problems. ? 2007 Springer-Verlag London Limited. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-38349086410&doi=10.1007%2fs00170-007-1175-9&partnerID=40&md5=bf3ff2e7a909bbd27574e7ca271bdce9 https://scholars.lib.ntu.edu.tw/handle/123456789/611963 |
DOI: | 10.1007/s00170-007-1175-9 |
顯示於: | 機械工程學系 |
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