Numerical Simulation of Flow and Heat Transfer Characteristics in Non-Closed Ring-Shaped Micro-Pin-Fin Arrays

Ming Chen, Can Ji (), Zhigang Liu and Naihua Wang
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Ming Chen: Energy Research Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China
Can Ji: Energy Research Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China
Zhigang Liu: Energy Research Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China
Naihua Wang: Institute of Thermal Science and Technology, Shandong University, Jinan 250061, China

Energies, 2023, vol. 16, issue 8, 1-17

Abstract: In this study, flow and heat transfer characteristics in novel non-closed 3/4 ring-shaped micro-pin-fin arrays with in-line and staggered layouts were investigated numerically. The flow distribution, wake structure, vorticity field and pressure drop were examined in detail, and convective heat transfer features were explored. Results show that vortex pairs appeared earlier in the ring-shaped micro-pin-fin array compared with the traditional circular devices. Pressure drop across the microchannel varied with layout of the fins, while little difference in pressure drop was observed between ring-shaped and circular fins of the same layouts, with the maximum difference being 1.43%. The staggered ring-shaped array was found to outperform the in-line array and the circular arrays in convective heat transfer. A maximum increase of 21.34% in heat transfer coefficient was observed in the ring-shaped micro-pin-fin array in comparison with the circular micro-pin-fin array. The overall thermal-hydraulic performance of the microstructure was evaluated, and the staggered ring-shaped array with a fin height of 0.5 mm exhibited the best performance among the configurations studied.

Keywords: micro-pin-fin array; microchannel; non-closed ring-shaped; flow characteristics; vortex structure; heat transfer enhancement (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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