Heat transfer characteristics of a dimpled/protrusioned pin fin wedge duct with different converging angles for turbine blades

A numerical method is utilized to investigate the converging angle effects on the flow structure and heat transfer of a pin fin wedge duct with dimples/protrusions. The studied converging angles are and The results show that a pin fin-dimple wedge duct with larger converging angle produces higher he...

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Bibliographic Details
Published in:Numerical heat transfer. Part A, Applications Applications, 2019-09, Vol.76 (5), p.369-392
Main Authors: Wang, Songtao, Yan, Han, Luo, Lei, Du, Wei, Sundén, Bengt, Zhang, Xinhong
Format: Article
Language:English
Subjects:
Acceleration
Convergence
Dimpling
Energiteknik
Energy Engineering
Engineering and Technology
Friction factor
Heat transfer
Impingement
Maskinteknik
Mechanical Engineering
Numerical methods
Pin fins
Shrinkage
Teknik
Turbine blades
Wedges
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Summary:A numerical method is utilized to investigate the converging angle effects on the flow structure and heat transfer of a pin fin wedge duct with dimples/protrusions. The studied converging angles are and The results show that a pin fin-dimple wedge duct with larger converging angle produces higher heat transfer enhancement due to flow acceleration, increase of the impingement region, and shrinkage of the flow recirculation region, but it is also accompanied with a much larger friction factor. A pin fin-protrusion wedge duct with larger converging angle yields higher heat transfer augmentation due to flow acceleration and more intense impingement on the protrusion but it is also associated with larger pressure penalty.
ISSN:1040-7782
1521-0634
DOI:10.1080/10407782.2019.1630235