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research-article

Heat Transfer Characteristics in a Rotating Pin Finned Duct with Different Protrusion Locations

[+] Author and Article Information
Wei Du

Harbin Institute of Technology, No.92, Xidazhi Street, Nangang District, Harbin City, Heilongjiang Province, China Harbin, China 150001 China hitdw9211@outlook.com

Lei Luo

mail box 458 Harbin Institute of Technology Harbin, Heilongjiang 150001 China leiluo@hit.edu.cn

Songtao Wang

Harbin Institute of Technology, No.92, Xidazhi Street, Nangang District, Harbin City, Heilongjiang Province, China Harbin, China 150001 China 736899318@qq.com

Shaokang Bi

P.O.box 458 Harbin Institute of Technology Harbin, China 150001 China earchit1@hotmail.com

Xinghong Zhang

Harbin Institute of Technology, No.92, Xidazhi Street, Nangang District, Harbin City, Heilongjiang Province, China Harbin, China 150001 China 513569992@qq.com

1Corresponding author.

Contributed by the Heat Transfer Division of ASME for publication in the Journal of Thermal Science and Engineering Applications. Manuscript received December 12, 2018; final manuscript received March 6, 2019; published online xx xx, xxxx. Assoc. Editor: Aaron P. Wemhoff.

ASME doi:10.1115/1.4043262 History: Received December 12, 2018; Accepted March 08, 2019

Abstract

The heat transfer in a pin finned duct is augmented by the protrusion in this study. The realizable k-ε turbulence model coupled with enhanced wall function is used to obtain the flow structure and heat transfer characteristics. Six different rotational numbers (Ro=0, 0.2, 0.4, 0.6, 0.8 and 1.0) and three different protrusion locations have been introduced. The pin fins and protrusions are placed on a simplified three-dimensional rectangular duct. Numerical results reveal that the Nusselt number in the pin finned channel have remarkable increase after adoption of the protrusions. In addition, the protrusion location and rotational number have the significant influence on the heat transfer distribution. The high rotational number is in favor of heat transfer enhancement on the endwall surface. Furthermore, the highest Nusselt number is occurred where protrusion is near the pin fin windward side.

Copyright © 2019 by ASME
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