Number：

01095003

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Name：

曾憲中

Titles：

Professor

Author：

Wei-Ping Ma , Sheng-Chung Tzeng

Paper name：

Spatial thermal regulation of aluminum foam heat sink
using a sintered porous conductive pipe

Name of activity：

International Journal of Heat and Mass Transfer

Keywords： rotating ribs , hing-speed rotating shaft

Abstract：

This study discusses lubrication and cooling effects of the high-speed rotating machines. The optimal channel design of rotating ribs of the rotating test section will enhance lubrication cooling purposes. Therefore, the minus effects upon thermal expansion and this will decrease the damage percentage of rotating machining tools, and will improve the processing precision and efficiency. To analyze the cooling behavior of working fluid, the experimental conditions are required to fit the practical operating parameters of 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 cooling area, showing 20-40% removal of heat than the smooth wall. Given various fluid velocity (Reynolds number, Re) and buoyancy parameter (Grashof number, Gr), Rib 4 also acquires highest cooling rate, and the larger the Re and Gr, the larger cooling efficiency. The experimental results are concluded to provide some useful reference data for similar high-speed rotating lubrication and cooling problems.

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