NDLI: Forced Convection Heat Transfer Using High Temperature and Pressure Water in an Upward-Inclined Tube

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Gang, Wu Wang, Han Yang, Zhendong Zhu, Xiaojing Hu, Zhihong Bi, Qincheng
Copyright Year	2012
Abstract	Within the range of pressure from 9 to 28 MPa, mass flux from 600 to 1500 kg/m2 s, heat flux at inside wall from 200 to 600 kW/m2 , and wall temperature up to 650 °C, experiments were conducted to research the forced convection heat transfer of water in an inclined upward tube with an inclination angle of 20 deg and an inner diameter of 26 mm. According to the experimental data, the effects of pressure and heat flux on heat transfer of water were analyzed in detail. In the subcritical pressure region, it was found that heat transfer characteristics of water are not uniform along the circumference of the inclined tube. Temperature of the top is always higher than that of the bottom, which can be attributed to the buoyancy effect in the inclined tube. In the supercritical pressure region, natural convection makes the low-density hot fluid gather at the top of the inclined tube; hence, heat transfer condition is deteriorated and wall temperature is increased. Furthermore, the criterions of Petukhov and Jackson were selected to judge the buoyancy effect in the inclined upward tube. The result seems acceptable but these criterions should be further improved to get a better applicability for an inclined tube.
Starting Page	020905
Ending Page	020912
Page Count	8
File Format	PDF
ISSN	00221481
e-ISSN	15288943
Journal	Journal of Heat Transfer
Volume Number	134
Issue Number	2
DOI	10.1115/1.4004901
Language	English
Publisher	The American Society of Mechanical Engineers
Publisher Date	2011-12-13
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Buoyancy Heat flux Heat transfer Pressure Wall temperature Water
Content Type	Text
Resource Type	Article
Subject	Mechanical Engineering Mechanics of Materials Condensed Matter Physics Materials Science

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