Abstract
In the present study, the numerical investigation is carried out by using Fluent 15.0 software to analyze the difference between symmetrical corrugation and asymmetrical corrugation on the flow field and heat transfer efficiency of corrugated tube in the Reynolds number range of 5000 to 40,000. Additionally, the effects of asymmetrical corrugation depth (H) and small corrugation radii (R) on flow field and heat transfer efficiency are discussed. The distributions of streamline, turbulence kinetic energy and turbulent viscosity are analyzed to reveal the mechanism of flow and heat transfer. The results show that the distribution of small corrugation is the key factor determining the heat transfer efficiency of ACT. Compared with SCT, the heat transfer efficiency of ACTR is significantly enhanced, while the heat transfer efficiency of ACTL is poor. Furthermore, the thermal-hydraulic performance (THP) of ACTR is enhanced as H increases or R decreases. The research provides a reference for the parameters optimization of ACT.
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