期刊
EXPERIMENTAL HEAT TRANSFER
卷 33, 期 5, 页码 419-439出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/08916152.2019.1656300
关键词
Helically coiled-twisted flat tube; heat transfer; fluid flow; numerical simulation; experimental study
资金
- National Natural Science Foundation of China [21576245]
Heat transfer performance and flow characteristics in the Helically Coiled-Twisted Flat Tube (HCTFT) are studied by a numerical simulation. According to the results, the secondary flow caused by the twisted structure destroys the velocity boundary layer, decreases the thermal-conduction resistance, increase the turbulence kinetic energy. The heat transfer performance of HCTFT is greater than Helically Coiled Smooth Tube (HCST). In the range of research, the Performance Evaluation Criterion (PEC) could achieve the maximum value 1.21, 1.21, 1.35 and 1.23, respectively. New correlations of heat transfer performance and flow characteristics in the tube side are developed.
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