Journal
EXPERIMENTAL THERMAL AND FLUID SCIENCE
Volume 47, Issue -, Pages 180-185Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.expthermflusci.2013.01.014
Keywords
Molten salt; Transition flow; Turbulent flow; Spirally grooved tube; Heat convection
Funding
- National Natural Science Foundation of China [51176206]
- National Basic Research Program of China (973 Program) [2010CB227103]
- Zhujiang Science & Technology Nova Program [2012J2200021]
Ask authors/readers for more resources
Transition and turbulent convective heat transfer performances of molten salt in spirally grooved tube were experimentally investigated using electric power through the testing tube. Various experiments were carried out within the range of Reynolds number 5000-15,000, Prandtl number 13.5-15.2, and relative groove height e/d was 0.0238, 0.0306, 0.0381 and 0.0475, respectively. The results showed that Nusselt number of molten salt flow in spirally grooved tube was higher than that of smooth tube, and the groove height increment can remarkably enhance heat transfer. Because the molten salt flow in spirally grooved tube was affected by spirally groove, its critical Reynolds number was less than that in smooth tube. Based on the experimental data and classical correlations by Sieder and Tate and Gnielinski, two modified correlations for molten salt flow in spirally grooved tube were developed by least-squares method. The modified correlations for transition and turbulent flow in spirally grooved tube had good agreement with experimental data, and their exponent of relative groove height was very close. (C) 2013 Elsevier Inc. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available