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

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Heat transfer characteristics of a dimpled/protrusioned pin fin wedge duct with different converging angles for turbine blades. / Wang, Songtao; Yan, Han; Luo, Lei; Du, Wei; Sundén, Bengt; Zhang, Xinhong.

In: Numerical Heat Transfer; Part A: Applications, Vol. 76, No. 5, 2019, p. 369-392.

Research output: Contribution to journalArticle

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TY - JOUR

T1 - Heat transfer characteristics of a dimpled/protrusioned pin fin wedge duct with different converging angles for turbine blades

AU - Wang, Songtao

AU - Yan, Han

AU - Luo, Lei

AU - Du, Wei

AU - Sundén, Bengt

AU - Zhang, Xinhong

PY - 2019

Y1 - 2019

N2 - 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.

AB - 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.

U2 - 10.1080/10407782.2019.1630235

DO - 10.1080/10407782.2019.1630235

M3 - Article

AN - SCOPUS:85068116331

VL - 76

SP - 369

EP - 392

JO - Numerical Heat Transfer Part A: Applications

JF - Numerical Heat Transfer Part A: Applications

SN - 1040-7782

IS - 5

ER -