Analysis of Performance of a Heat Sink in Non-uniform Flow Field

• Main Authors: Chih-An Chen, 陳志安
• Other Authors: Hong-Sen Kou
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/19539573207491733987

碩士 === 大同大學 === 機械工程學系(所) === 98 === In this study, the aim is to enhance the performance of a thermal module with improving the fluid field by a plate with different slanted angles, positions and sizes. It is focused on improving thermal performance with a strong fluid field near the bottom of a heat sink by limited the fluid flow around the top of the fin. Supplying the high fluid velocity over the high temperature surface will enhance the cooling ability of the thermal module. The varied fluid velocity is an important factor for the level of the non-uniform fluid field in this study. To reach the goal, the fluid field influenced by a slanted plate in front of the heat sink. Investigated results show that the thermal performance is increased 5.8％ with varied slanted angles. By adjusting the plate to appropriate position, the performance were raised 8.7％. There is a 13.6％ enhancement of the thermal performance if the size of the plate is changed appropriately. The inappropriate size of the plate will decrease the thermal performance about 4.1％. Base on the right slanted type, position and size, the maximum enhancement on the performance of the thermal module is 21.4％ in characteristic height of fin. The increasement of the pressure loss depends on the variation of the thermal performance. Regarding the compromise between the thermal performance and the pressure loss, designers may select what they need by the results of this study.