Heat transfer in the trailing region of gas turbines – A state-of-the-art review
(2021) In Applied Thermal Engineering 199.- Abstract
Highly efficient gas turbines are beneficial for improving the energy structure, reducing carbon dioxide emissions and protecting the Earth's environment. A highly efficient gas turbine means a higher inlet temperature and requires a more efficient cooling structure. Due to the limitations of aerodynamics, structure and strength, cracks, fractures and ablation easily form at the trailing edge of gas turbines. Thus, it is vital to enhance the heat transfer in the trailing edge of gas turbines. In practical applications, internal cooling structures (pin fins, latticework ducts) and film cooling are used simultaneously. In addition, some innovative cooling structures have been proposed, such as dimples/protrusions, labyrinth channels and... (More)
Highly efficient gas turbines are beneficial for improving the energy structure, reducing carbon dioxide emissions and protecting the Earth's environment. A highly efficient gas turbine means a higher inlet temperature and requires a more efficient cooling structure. Due to the limitations of aerodynamics, structure and strength, cracks, fractures and ablation easily form at the trailing edge of gas turbines. Thus, it is vital to enhance the heat transfer in the trailing edge of gas turbines. In practical applications, internal cooling structures (pin fins, latticework ducts) and film cooling are used simultaneously. In addition, some innovative cooling structures have been proposed, such as dimples/protrusions, labyrinth channels and so on. Research progress on turbine trailing edge cooling structures is presented in this paper. For pin finned duct, the heat transfer and flow structure characteristics are introduced for single rows, multirows, static and rotating conditions. Investigations on latticework ducts are quite inadequate. Therefore, only the main flow and heat transfer characteristics are shown in this paper. For film cooling at the trailing edge, experimental results and numerical results are introduced. Finally, some suggestions for heat transfer research in the trailing edge region are proposed.
(Less)
- author
- Du, Wei LU ; Luo, Lei ; Jiao, Yinghou ; Wang, Songtao ; Li, Xingchen LU and Sunden, Bengt LU
- organization
- publishing date
- 2021-11
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Cooling structures, Enhancement, Future trends, Heat transfer, Trailing region
- in
- Applied Thermal Engineering
- volume
- 199
- article number
- 117614
- publisher
- Elsevier
- external identifiers
-
- scopus:85115940379
- ISSN
- 1359-4311
- DOI
- 10.1016/j.applthermaleng.2021.117614
- language
- English
- LU publication?
- yes
- additional info
- Publisher Copyright: © 2021 The Authors
- id
- 10c4832d-c391-4376-b05a-8f6be82c8187
- date added to LUP
- 2021-10-19 11:21:15
- date last changed
- 2023-11-08 21:21:00
@article{10c4832d-c391-4376-b05a-8f6be82c8187,
abstract = {{<p>Highly efficient gas turbines are beneficial for improving the energy structure, reducing carbon dioxide emissions and protecting the Earth's environment. A highly efficient gas turbine means a higher inlet temperature and requires a more efficient cooling structure. Due to the limitations of aerodynamics, structure and strength, cracks, fractures and ablation easily form at the trailing edge of gas turbines. Thus, it is vital to enhance the heat transfer in the trailing edge of gas turbines. In practical applications, internal cooling structures (pin fins, latticework ducts) and film cooling are used simultaneously. In addition, some innovative cooling structures have been proposed, such as dimples/protrusions, labyrinth channels and so on. Research progress on turbine trailing edge cooling structures is presented in this paper. For pin finned duct, the heat transfer and flow structure characteristics are introduced for single rows, multirows, static and rotating conditions. Investigations on latticework ducts are quite inadequate. Therefore, only the main flow and heat transfer characteristics are shown in this paper. For film cooling at the trailing edge, experimental results and numerical results are introduced. Finally, some suggestions for heat transfer research in the trailing edge region are proposed.</p>}},
author = {{Du, Wei and Luo, Lei and Jiao, Yinghou and Wang, Songtao and Li, Xingchen and Sunden, Bengt}},
issn = {{1359-4311}},
keywords = {{Cooling structures; Enhancement; Future trends; Heat transfer; Trailing region}},
language = {{eng}},
publisher = {{Elsevier}},
series = {{Applied Thermal Engineering}},
title = {{Heat transfer in the trailing region of gas turbines – A state-of-the-art review}},
url = {{http://dx.doi.org/10.1016/j.applthermaleng.2021.117614}},
doi = {{10.1016/j.applthermaleng.2021.117614}},
volume = {{199}},
year = {{2021}},
}