Thermal performance investigation of a plate fin heat sink equipped with twisted tape and perforated twisted tape

Journal of Thermal Science and Technology

Kitti NILPUENG¹  Somchai WONGWISES² 

[1] Research Centre for Combustion Technology and Alternative Energy (CTAE), Department of Power Engineering Technology, College of Industrial Technology, King Mongkut's University of Technology North Bangkok;

关键词: heat transfer enhancement;    twist ratio;    porosity;    swirl flow;   

DOI  :  10.1299/jtst.2021jtst0024

来源: DOAJ

【 摘 要 】

The concept of heat transfer enhancement in a plate fin heat sink (PFHS) using twisted tape is presented. The airflow behavior in the flow channel and heat sink performance are investigated at the Reynolds numbers between 2000 and 5000. The twisted tape and perforated twisted tape with twist ratio between 2.5 and 3.5 are equipped between the fins of the PFHS. For perforated twisted tape, the holes are drilled along the twisted tape length with the ratio of perforation diameter to twisted taped width (d/W) between 0.2 and 0.6. The heat transfer coefficient and pressure drop are enhanced by decreasing the twist ratio and increasing the Reynolds number and the d/W ratio between 0.2 and 0.4. However, they are dropped when the d/W ratio higher than 0.4. The highest thermal performance factors of the plate fin heat sink equipped with twisted tape (PFHSTT) and the plate fin heat sink equipped with perforated twisted tape (PFHSPTT) are 1.28 and 1.33, respectively. The correlations of the Nusselt number and friction factor related to twist ratio and d/W ratio are generated and proposed for designing and selecting in the future.

【 授权许可】

Unknown