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Numerical investigation of particle deposition in film-cooled blade leading edge

Wang, Jin LU ; Tian, Ke ; Zhu, Hengxuan ; Zeng, Min LU and Sundén, Bengt LU (2020) In Numerical Heat Transfer; Part A: Applications 77(6). p.579-598
Abstract

This study numerically investigates film-cooling performance and particle trajectories in AGTB (two rows of cylindrical holes equipped on suction side (SS) and pressure side (PS) of the leading edge, respectively) turbine cascade. Particle deposition on a turbine blade is analyzed by calculations of capture efficiency and impact efficiency. The turbulent flow is modeled by the Realizable k-ε turbulence model, and the discrete phase model (DPM) with user-defined functions (UDFs) is used to simulate the particle motions. An invasion efficiency is proposed to analyze the possibility of particle invasion into the film hole. Comparisons of various particles with diameters of 1 µm, 5 µm, 10 µm, 20 µm, and 50 µm, respectively, are conducted... (More)

This study numerically investigates film-cooling performance and particle trajectories in AGTB (two rows of cylindrical holes equipped on suction side (SS) and pressure side (PS) of the leading edge, respectively) turbine cascade. Particle deposition on a turbine blade is analyzed by calculations of capture efficiency and impact efficiency. The turbulent flow is modeled by the Realizable k-ε turbulence model, and the discrete phase model (DPM) with user-defined functions (UDFs) is used to simulate the particle motions. An invasion efficiency is proposed to analyze the possibility of particle invasion into the film hole. Comparisons of various particles with diameters of 1 µm, 5 µm, 10 µm, 20 µm, and 50 µm, respectively, are conducted for four blowing ratios (0.53, 0.93, 1.31, 1.63) and three inlet flow angles (123°, 133°, and 143°). It is observed that with a small inlet flow angle and a large blowing ratio, the capture efficiency on the PS decreases. It is found that smaller particle size results in lower invasion efficiency, and larger particles are more likely to invade into the film-cooling hole especially at a low blowing ratio.

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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Numerical Heat Transfer; Part A: Applications
volume
77
issue
6
pages
20 pages
publisher
Taylor & Francis
external identifiers
  • scopus:85078400957
ISSN
1040-7782
DOI
10.1080/10407782.2020.1713692
language
English
LU publication?
yes
id
ef97345e-327a-45ca-9c38-94c019450ced
date added to LUP
2020-02-06 14:32:42
date last changed
2023-11-19 22:35:33
@article{ef97345e-327a-45ca-9c38-94c019450ced,
  abstract     = {{<p>This study numerically investigates film-cooling performance and particle trajectories in AGTB (two rows of cylindrical holes equipped on suction side (SS) and pressure side (PS) of the leading edge, respectively) turbine cascade. Particle deposition on a turbine blade is analyzed by calculations of capture efficiency and impact efficiency. The turbulent flow is modeled by the Realizable k-ε turbulence model, and the discrete phase model (DPM) with user-defined functions (UDFs) is used to simulate the particle motions. An invasion efficiency is proposed to analyze the possibility of particle invasion into the film hole. Comparisons of various particles with diameters of 1 µm, 5 µm, 10 µm, 20 µm, and 50 µm, respectively, are conducted for four blowing ratios (0.53, 0.93, 1.31, 1.63) and three inlet flow angles (123°, 133°, and 143°). It is observed that with a small inlet flow angle and a large blowing ratio, the capture efficiency on the PS decreases. It is found that smaller particle size results in lower invasion efficiency, and larger particles are more likely to invade into the film-cooling hole especially at a low blowing ratio.</p>}},
  author       = {{Wang, Jin and Tian, Ke and Zhu, Hengxuan and Zeng, Min and Sundén, Bengt}},
  issn         = {{1040-7782}},
  language     = {{eng}},
  month        = {{01}},
  number       = {{6}},
  pages        = {{579--598}},
  publisher    = {{Taylor & Francis}},
  series       = {{Numerical Heat Transfer; Part A: Applications}},
  title        = {{Numerical investigation of particle deposition in film-cooled blade leading edge}},
  url          = {{http://dx.doi.org/10.1080/10407782.2020.1713692}},
  doi          = {{10.1080/10407782.2020.1713692}},
  volume       = {{77}},
  year         = {{2020}},
}