流体绕流微柱群的Micro-PIV实验研究

doi:10.3976/j.issn.1002-4026.2018.06.008

SHANDONG SCIENCE ›› 2018, Vol. 31 ›› Issue (6): 50-54.doi: 10.3976/j.issn.1002-4026.2018.06.008

• Energy and Power • Previous Articles Next Articles

Experimental study on flow past micro-cylinder-groups by Micro-PIV method

LI Yong¹, LÜ Ming-ming^1*, LIU Zhi-gang¹, ZHU Ye²

1.Energy Research Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China; 2.Jiangsu Design and Research Institute of Energy Conservation Engineering Limited Company, Nanjing 210007, China

Received:2018-08-22 Published:2018-12-20 Online:2018-12-20
Contact: Lü Ming-ming E-mail:lvmm@sderi.cn

Abstract

Abstract:

The micro-cylinder-group is an efficient heat dissipation structure, which has great application prospects for solving the cooling problems in micro space. The flow characteristics in the channel with micro-cylinder-group are the foundation for the design and optimization of the heat dissipation structure. Micro particle image velocimetry (Micro-PIV) was used to study the flow past the micro-cylinder-group and the flow field around micro-cylinders with different Reynolds numbers was measured. The velocity field of the micro-cylinder-group and the effects of Reynolds number on the vortex structure and the backflow length were analyzed. The results show that vortex structure appears in the wake region of micro-cylinder and the backflow length increases gradually with the increase of Reynolds number. The boundary layer separation phenomenon in flow past the micro-cylinder has a certain lag compared with the macro-scale.

Key words: flow past cylinder, vortex structure, Micro-PIV, micro-cylinder-groups, backflow

CLC Number:

TK124

LI Yong, Lü Ming-ming, LIU Zhi-gang, ZHU Ye . Experimental study on flow past micro-cylinder-groups by Micro-PIV method[J].SHANDONG SCIENCE, 2018, 31(6): 50-54.

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Experimental study on flow past micro-cylinder-groups by Micro-PIV method

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