Journal
HEAT TRANSFER ENGINEERING
Volume 37, Issue 3-4, Pages 279-289Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/01457632.2015.1052665
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Funding
- National Science Foundation of Zhejiang Province, China [Z13E060001]
- National Natural Science Foundation of China [51210011]
- Research Award Fund for Outstanding Young Scientists in Shandong province [BS2012CL014]
- Ph.D. Program Foundation of the Ministry of Education of China [20120101110102]
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A numerical analysis of heat transfer and pressure drop for turbulent flow in a series of 15.54-mm inside diameter helically ribbed tubes has been performed. The ranges of geometric parameters were number of rib starts (10 to 40), helix angle (25 to 55 degrees), and rib height (0.3 to 0.6mm). The effect of grid independence was extensively examined. The computational results match well with the experimental data to validate the accuracy of the numerical model. The effect of each main parameter, rib starts, helix angle, and rib height, on heat transfer and pressure drop is investigated. Considering fouling in practical situations, the ratio of pitch over rib height is an important parameter to select the tubes. It is advisable to select tubes with pitch over rib height ratio greater than 3.5, which have better heat transfer and lower fouling potential.
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