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Chemcial Industry and Engineering 2019, Vol. 36 Issue (3) :55-63    DOI: 10.13353/j.issn.1004.9533.20171001
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Numerical Study on Flow Characteristics and Heat Transfer for a Circular Tube with Turbulators
Sun Yongli, Wen Guobin, Xiao Xiaoming
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

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Abstract Regarding to heat transfer enhancement always along with the pressure drop penalty, the study compared and analyzed flow characteristics and heat transfer in the circular tube with ‘V’-baffle (V-baf), Center-rod (C-rod), and Swirl-generator (S-gen) using numerical simulation. The results showed:turbulators can improve heat transfer. PEC (Performance Evaluation Criterion) can be easily understood and calculated, which considers both heat transfer enhancement and pressure drop penalty. Compared with C-rod and V-baf, S-gen can induce swirl flow, which can enhance flow mixing in radius direction, increasing temperature uniformity in the core flow. This is according to the enhancement principle of secondary flow and core flow. Meanwhile, the swirl flow can maintain a long distance with little decaying, which has great heat transfer enhancement.
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Articles by authors
Sun Yongli
Wen Guobin
Xiao Xiaoming
Keywordsheat transfer enhancement;   turbulators;   swirl flow     
Received 2017-02-20;
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Sun Yongli, Wen Guobin, Xiao Xiaoming.Numerical Study on Flow Characteristics and Heat Transfer for a Circular Tube with Turbulators[J]  Chemcial Industry and Engineering, 2019,V36(3): 55-63
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