Effects of longitudinal vortex generator pairs in transverse microchambers on thermal–hydraulic performances and entropy generation in an interrupted microchannel heat sink.

Autor: Feng, Zhenfei, Lan, Yongqi, Hu, Zhenjun, Zheng, Siyao, Zhang, Yanjuan, Huang, Zuqiang, Zhang, Jinxin
Předmět:
Zdroj: Journal of Thermal Analysis & Calorimetry; Aug2022, Vol. 147 Issue 15, p8551-8567, 17p
Abstrakt: A novel interrupted microchannel heat sink with longitudinal vortex generator (LVG) pairs in transverse microchambers is presented in this study. The effects of LVG pairs in transverse microchambers on thermal–hydraulic performances due to the Nusselt number and flow friction, as well as the entropy generation due to the heat transfer and flow irreversibility in microchannel are analyzed for Reynolds number of 133–596. The studied parameters of LVG pairs include height (H = 0.025–0.175 mm), transverse spacing (S = 0.01–0.07 mm) and setting angle (A = 30–75º). The results indicate that LVG pairs plays a significant effect on the thermal–hydraulic performance and entropy generation in microchannel as consequence of the perturbation generated by longitudinal vortexes in transverse microchambers. The greatest overall thermal performance factor of 1.45 and the lowest augmentation entropy generation number of 0.764 are both obtained by LVG pairs with H = 0.075 mm, S = 0.01 mm and A = 75º at Reynolds number of 596. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje