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Effects of the cooling configurations layout near the first-stage vane leading edge on the endwall cooling and phantom cooling of the vane suction side surface

Du, Kun LU ; Li, Jun and Sunden, Bengt LU (2018) In International Journal of Heat and Mass Transfer 123. p.1021-1034
Abstract

Increasing the turbine inlet temperature can enhance the thermal efficiency of a gas turbine. Therefore, modern gas turbines operate at a relatively high level of temperature and endure heavy thermal load. It is important to ensure the modern gas turbine works at a high performance and safe condition. Advanced cooling techniques are implemented in the gas turbine system. In the current study, effects of the cooling configurations layout near the first-stage vane leading edge on the endwall cooling and phantom cooling of the vane suction side surface were numerically investigated. Three-dimensional (3D) Reynolds-averaged Navier-Stokes (RANS) equations combined with the shear stress transport (SST) k-ω turbulence model were solved to... (More)

Increasing the turbine inlet temperature can enhance the thermal efficiency of a gas turbine. Therefore, modern gas turbines operate at a relatively high level of temperature and endure heavy thermal load. It is important to ensure the modern gas turbine works at a high performance and safe condition. Advanced cooling techniques are implemented in the gas turbine system. In the current study, effects of the cooling configurations layout near the first-stage vane leading edge on the endwall cooling and phantom cooling of the vane suction side surface were numerically investigated. Three-dimensional (3D) Reynolds-averaged Navier-Stokes (RANS) equations combined with the shear stress transport (SST) k-ω turbulence model were solved to perform the simulations on basis of validation by comparing the experimental data and computational results. The results indicate that the layout of the cooling configurations has a significant influence on the endwall cooling, but a limited effect on the phantom cooling of the suction side surface and the aerodynamic performance. For each type, the endwall cooling and phantom cooling of the suction side surface are enhanced with the increase of the blowing ratio (M) of the leading edge coolant injection. Meanwhile, the thermodynamic loss is gradually enhanced. Overall, the Type B which has a partly blocked upstream slot achieves the best performance in terms of the coolant mass flowrate, endwall cooling, phantom cooling performance of the suction side surface and the aerodynamic performance at M=1.0.

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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Cooling configurations layout, Endwall cooling, Numerical simulation, Phantom cooling
in
International Journal of Heat and Mass Transfer
volume
123
pages
14 pages
publisher
Pergamon Press Ltd.
external identifiers
  • scopus:85044044029
ISSN
0017-9310
DOI
10.1016/j.ijheatmasstransfer.2018.03.038
language
English
LU publication?
yes
id
26489ac9-92aa-4875-885a-ac50ce83d876
date added to LUP
2018-04-03 12:17:31
date last changed
2021-01-26 01:08:01
@article{26489ac9-92aa-4875-885a-ac50ce83d876,
  abstract     = {<p>Increasing the turbine inlet temperature can enhance the thermal efficiency of a gas turbine. Therefore, modern gas turbines operate at a relatively high level of temperature and endure heavy thermal load. It is important to ensure the modern gas turbine works at a high performance and safe condition. Advanced cooling techniques are implemented in the gas turbine system. In the current study, effects of the cooling configurations layout near the first-stage vane leading edge on the endwall cooling and phantom cooling of the vane suction side surface were numerically investigated. Three-dimensional (3D) Reynolds-averaged Navier-Stokes (RANS) equations combined with the shear stress transport (SST) k-ω turbulence model were solved to perform the simulations on basis of validation by comparing the experimental data and computational results. The results indicate that the layout of the cooling configurations has a significant influence on the endwall cooling, but a limited effect on the phantom cooling of the suction side surface and the aerodynamic performance. For each type, the endwall cooling and phantom cooling of the suction side surface are enhanced with the increase of the blowing ratio (M) of the leading edge coolant injection. Meanwhile, the thermodynamic loss is gradually enhanced. Overall, the Type B which has a partly blocked upstream slot achieves the best performance in terms of the coolant mass flowrate, endwall cooling, phantom cooling performance of the suction side surface and the aerodynamic performance at M=1.0.</p>},
  author       = {Du, Kun and Li, Jun and Sunden, Bengt},
  issn         = {0017-9310},
  language     = {eng},
  month        = {08},
  pages        = {1021--1034},
  publisher    = {Pergamon Press Ltd.},
  series       = {International Journal of Heat and Mass Transfer},
  title        = {Effects of the cooling configurations layout near the first-stage vane leading edge on the endwall cooling and phantom cooling of the vane suction side surface},
  url          = {http://dx.doi.org/10.1016/j.ijheatmasstransfer.2018.03.038},
  doi          = {10.1016/j.ijheatmasstransfer.2018.03.038},
  volume       = {123},
  year         = {2018},
}