Experimental Study on Horizontal Cylinders with Triangular Fins under Natural Convection

Energies

Dong-Kwon Kim¹  HyunJung Kim¹  Gu-Won Lee¹ 

[1] Department of Mechanical Engineering, Ajou University, Suwon 443-749, Korea;

关键词: finned cylinders;    natural convection;    Nusselt number;   

DOI  :  10.3390/en11040836

来源: DOAJ

【 摘 要 】

In this study, thermal resistances of horizontal cylinders with triangular fins were measured in regard to fin numbers, fins heights, and temperature differences. Thereafter, an empirical correlation was proposed and validated for predicting the Nusselt numbers under the following conditions: Rayleigh number, 200,000–1,000,000; fin aspect ratio, 1.6–5.0; and fin number, 9–72. Finally, with the proposed correlation, the effects of fin numbers, fins heights, and fin thicknesses on the thermal resistances of the horizontal cylinders with triangular fins were investigated. It was shown that the thermal resistance generally increases as the fin number, fin height, and fin thickness increase. It is expected that horizontal cylinders for various cooling devices with triangular fins can be designed based on the findings of the present study.

【 授权许可】

Unknown