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

Songtao Wang, Han Yan, Lei Luo, Wei Du, Bengt Sundén, Xinhong Zhang

Research output: Contribution to journalArticlepeer-review

5 Citations (SciVal)

Abstract

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 0:0°; 6:3°; and 12:7° 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.

Original languageEnglish
Pages (from-to)369-392
JournalNumerical Heat Transfer; Part A: Applications
Volume76
Issue number5
Early online date2019 Jun 21
DOIs
Publication statusPublished - 2019

Subject classification (UKÄ)

  • Energy Engineering

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