Heat transfer and flow structure in a rotating duct with detached pin fins

Wei Du, Lei Luo, Songtao Wang, Jian Liu, Bengt Sunden

Research output: Contribution to journalArticlepeer-review

15 Citations (SciVal)

Abstract

The realizable k - ε turbulence model was used to calculate flow and heat transfer characteristics in a rotating rectangular duct with detached pin fins in staggered arrangement. Transverse and longitudinal spacings of the pin fins were S 1 = 2.5 D and S 2 = 2.5 D, respectively. Reynolds number was 7,000 and Rotation number (Ro) varied from 0 to 1 while the clearance ranged from 0 to 0.5. Streamlines, vortex structure, wall shear stresses and Nusselt numbers were obtained. Flow phenomenon at the pin fin rear side and a leakage vortex near the pin fin tip were observed. High Nusselt numbers appeared on leading side. The leakage vortex imposed high energy losses in the mainflow. The flow and heat transfer characteristics were associated with Ro number and clearance. Middle values of Ro and clearance induced highest Nusselt numbers on leading side. However, high Ro and small clearance gave highest Nusselt numbers on trailing side.

Original languageEnglish
Pages (from-to)217-241
Number of pages25
JournalNumerical Heat Transfer; Part A: Applications
Volume75
Issue number4
DOIs
Publication statusPublished - 2019

Subject classification (UKÄ)

  • Energy Engineering

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