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http://dx.doi.org/10.7467/KSAE.2015.23.2.191

Numerical Study on the Flow Characteristics according to the Ventilation Holes Shape of the Carbon Composite Brake Disk  

Ko, Dongguk (Department of Mechanical Engineering, Graduate School, Chonbuk National University)
Yoon, Suckju (Department of Mechanical Engineering, Chonbuk National University)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.23, no.2, 2015 , pp. 191-198 More about this Journal
Abstract
In this study, the flow characteristics at the ventilation holes was analyzed by using numerical method when carbon composite brake disk was rotated at a constant speed. In order to ensure the validity of the analysis results, grid dependency test was performed by considering the accuracy and appropriateness, and 4mm mesh size was selected for decrease of the maximum error rate 63.6%. As a result, the outside air flows in the clearance between the disk and shaft in case of B model. whereas, the outside air flows in the clearance or the outlet of the ventilation holes in case of A and C models. And also average static pressure at the outlet was changed depending on shape of the ventilation holes and rotational speed of the disk in case of A and C models. Besides, in the B model, intake air according to the clearance goes with side surface of ventilation hole, and so increased by mean velocity of 4.64m/s and mean pressure of 0.58pa in the ventilation hole outlet, in case of disk rotational speed of 146.21rad/s.
Keywords
Grid dependency; Flow characteristics; Clearance; Vortex region; Reverse pressure region; Reattachment point;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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