Strongly Heated Turbulent Flow in a Channel with Pin Fins

Chien-Shing Lee, Tom I. -P. Shih (), Kenneth Mark Bryden, Richard P. Dalton and Richard A. Dennis
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Chien-Shing Lee: School of Aeronautics and Astronautics, Purdue University, West Lafayette, IN 47907, USA
Tom I. -P. Shih: School of Aeronautics and Astronautics, Purdue University, West Lafayette, IN 47907, USA
Kenneth Mark Bryden: Ames Laboratory, U.S. Department of Energy, Ames, IA 50010, USA
Richard P. Dalton: National Energy Technology Laboratory, U.S. Department of Energy, Morgantown, WV 26507, USA
Richard A. Dennis: National Energy Technology Laboratory, U.S. Department of Energy, Morgantown, WV 26507, USA

Energies, 2023, vol. 16, issue 3, 1-21

Abstract: Large-eddy simulations (LES) were performed to study the turbulent flow in a channel of height H with a staggered array of pin fins with diameter D = H/2 as a function of heating loads that are relevant to the cooling of turbine blades and vanes. The following three heating loads were investigated—wall-to-coolant temperatures of T w /T c = 1.01, 2.0, and 4.0—where the Reynolds number at the channel inlet was 10,000 and the back pressure at the channel outlet was 1 bar. For the LES, two different subgrid-scale models—the dynamic kinetic energy model (DKEM) and the wall-adapting local eddy-viscosity model (WALE)—were examined and compared. This study was validated by comparing with data from direct numerical simulation and experimental measurements. The results obtained show high heating loads to create wall jets next to all heated surfaces that significantly alter the structure of the turbulent flow. Results generated on effects of heat loads on the mean and fluctuating components of velocity and temperature, turbulent kinetic energy, the anisotropy of the Reynolds stresses, and velocity-temperature correlations can be used to improve existing RANS models.

Keywords: LES; internal cooling; pin fin; heat loads; turbulence (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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