An empirical correlation for the heat transfer enhancement of planar elastic tube bundle by flow-induced vibration

2020 ◽  
Vol 155 ◽  
pp. 106405 ◽  
Author(s):  
Derong Duan ◽  
Peiqi Ge ◽  
Wenbo Bi ◽  
Xuefeng Yang ◽  
Xiuli Fu ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Enhancement ◽  
Tube Bundle ◽  
Elastic Tube ◽  
Empirical Correlation ◽  
Transfer Enhancement ◽  
Flow Induced Vibration ◽  
Planar Elastic Tube Bundle

Design of a Microfin Array Heat Sink Using Flow-Induced Vibration to Enhance the Heat Transfer Rate in the Laminar Flow Regime

2001 ◽  
Author(s):  
Jeung Sang Go ◽  
Geunbae Lim ◽  
Hayong Yun ◽  
Sung Jin Kim ◽  
Inseob Song
Keyword(s):  
Heat Transfer ◽  
Laminar Flow ◽  
Heat Transfer Enhancement ◽  
Flow Regime ◽  
Heat Transfer Rate ◽  
Heat Sink ◽  
Transfer Rate ◽  
Transfer Enhancement ◽  
Air Velocity ◽  
Flow Induced Vibration

Abstract This paper presented design guideline of the microfin array heat sink using flow-induced vibration to increase the heat transfer rate in the laminar flow regime. Effect of the flow-induced vibration of a microfin array on heat transfer enhancement was investigated experimentally by comparing the thermal resistances of the microfin array heat sink and those of a plain-wall heat sink. At the air velocities of 4.4m/s and 5.5 m/s, an increase of 5.5% and 11.5% in the heat transfer rate was obtained, respectively. The microfin flow sensor also characterized the flow-induced vibration of the microfin. It was determined that the microfin vibrates with the fundamental natural frequency regardless of the air velocity. It was also shown that the vibrating displacement of the microfin is increased with increasing air velocity and then saturated over a certain value of air velocity. Based on the numerical analysis of the temperature distribution resulted from microfin vibration and experimental results, a simple heat transfer model (heat pumping model) was proposed to understand the heat transfer mechanism of a microfin array heat sink. Under the geometric and structural constraints, the maximum heat transfer enhancement was obtained at the intersection of the minimum thickness of the microfin and constraint of the bending angle.

Study on the Conical Spiral Tube Bundle Heat Exchangers with Pulsation Flow Generator Structure

2011 ◽  
Vol 143-144 ◽  
pp. 698-702 ◽  
Author(s):  
Meng Ran Ge ◽  
Ke Yan ◽  
Pei Qi Ge ◽  
Jun Gao
Keyword(s):  
Heat Transfer ◽  
Natural Frequency ◽  
Heat Exchangers ◽  
Heat Transfer Performance ◽  
Tube Bundle ◽  
Elastic Tube ◽  
Transfer Performance ◽  
Spiral Tube ◽  
Flow Generator ◽  
Planar Elastic Tube Bundle

Elastic tube bundles are universally used in heat transfer enhancement by flow-induced vibration in heat exchangers, and the study of the heat transfer performance is of importance. The structure of conical spiral tube bundle heat exchanger was introduced first, and the structure of pulsation flow generator was also introduced. The frequency of pulsation flow was discussed. Finally, in condition of same shell side diameter, the heat transfer and natural frequency of the conical spiral tube bundle were compared with the planar elastic tube bundle. The results show that the natural frequency of conical spiral tube bundle was smaller, the heat transfer performance of conical spiral tube bundle was better than the planar elastic tube bundle.

Heat transfer enhancement using flow-induced vibration of a microfin array

2001 ◽  
Vol 90 (3) ◽  
pp. 232-239 ◽  
Author(s):  
Jeung Sang Go ◽  
Sung Jin Kim ◽  
Geunbae Lim ◽  
Hayong Yun ◽  
Junghyun Lee ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Enhancement ◽  
Transfer Enhancement ◽  
Flow Induced Vibration
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