Strongly Heated Turbulent Flow in a Channel with Pin Fins
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—w...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-01-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/16/3/1215 |
| _version_ | 1797624716516655104 |
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| author | Chien-Shing Lee Tom I. -P. Shih Kenneth Mark Bryden Richard P. Dalton Richard A. Dennis |
| author_facet | Chien-Shing Lee Tom I. -P. Shih Kenneth Mark Bryden Richard P. Dalton Richard A. Dennis |
| author_sort | Chien-Shing Lee |
| collection | DOAJ |
| description | 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<sub>w</sub>/T<sub>c</sub> = 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. |
| first_indexed | 2024-03-11T09:46:29Z |
| format | Article |
| id | doaj.art-e197676ff64f4e5fa40be2c67f58d1e3 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-11T09:46:29Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-e197676ff64f4e5fa40be2c67f58d1e32023-11-16T16:34:19ZengMDPI AGEnergies1996-10732023-01-01163121510.3390/en16031215Strongly Heated Turbulent Flow in a Channel with Pin FinsChien-Shing Lee0Tom I. -P. Shih1Kenneth Mark Bryden2Richard P. Dalton3Richard A. Dennis4School of Aeronautics and Astronautics, Purdue University, West Lafayette, IN 47907, USASchool of Aeronautics and Astronautics, Purdue University, West Lafayette, IN 47907, USAAmes Laboratory, U.S. Department of Energy, Ames, IA 50010, USANational Energy Technology Laboratory, U.S. Department of Energy, Morgantown, WV 26507, USANational Energy Technology Laboratory, U.S. Department of Energy, Morgantown, WV 26507, USALarge-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<sub>w</sub>/T<sub>c</sub> = 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.https://www.mdpi.com/1996-1073/16/3/1215LESinternal coolingpin finheat loadsturbulence |
| spellingShingle | Chien-Shing Lee Tom I. -P. Shih Kenneth Mark Bryden Richard P. Dalton Richard A. Dennis Strongly Heated Turbulent Flow in a Channel with Pin Fins Energies LES internal cooling pin fin heat loads turbulence |
| title | Strongly Heated Turbulent Flow in a Channel with Pin Fins |
| title_full | Strongly Heated Turbulent Flow in a Channel with Pin Fins |
| title_fullStr | Strongly Heated Turbulent Flow in a Channel with Pin Fins |
| title_full_unstemmed | Strongly Heated Turbulent Flow in a Channel with Pin Fins |
| title_short | Strongly Heated Turbulent Flow in a Channel with Pin Fins |
| title_sort | strongly heated turbulent flow in a channel with pin fins |
| topic | LES internal cooling pin fin heat loads turbulence |
| url | https://www.mdpi.com/1996-1073/16/3/1215 |
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