用户登录 购物车
图书馆订购 Guest
主页 旧刊 有关人员 未来大会 American Society of Thermal and Fluids Engineering

ISSN 在线: 2379-1748

ISBN 打印: 978-1-56700-517-2 (Flash drive)

5-6th Thermal and Fluids Engineering Conference (TFEC)
May, 26–28, 2021 , Virtual

EFFECT OF HEATING ON THE FULLY-DEVELOPED FRICTION FACTORS IN HORIZONTAL MINI-TUBES

Get access pages 907-916
DOI: 10.1615/TFEC2021.fnd.032064

摘要

Under the heating condition, it is of interest to see whether the friction factor characteristics in mini-tubes are the same as those of macro-tubes, especially, in the complicated transition region. Therefore, an experimental setup was built for this study to measure the mini-tube pressure drop (friction factor) under the uniform wall heat flux boundary condition. In this study, the fully developed pressure drops were measured in a test section fitted with horizontal mini-tubes of 4 mm and 2 mm inner diameters. A straight tube length was used as the inlet configuration. The entire experiment covered the Reynolds number range between 1000 and 5000 (laminar-transition-turbulent regions). For the friction factor results, heating caused a decrease in the laminar and transitional friction factors and higher heat flux applied to the mini-tube delayed the start and end of the transition region. For both diameters, the friction factor data were reasonably predicted by the classical macro-scale correlations in the laminar, transition, and turbulent regions.
主页 旧刊 有关人员 未来大会 American Society of Thermal and Fluids Engineering 中文 English Русский Português 帮助 联系我们 返回至ASTFE