In the present work, a numerical study on a novel shaped film-cooling hole has been performed. The novel shaped hole is designed to enhance lateral spreading of coolant on the cooling surface. The film-cooling performance of the novel shaped hole is compared with the fan, laidback fan, and dumbbell shaped film-cooling holes at density ratio of 1.75 in the range of blowing ratio from 0.5 to 2.5. The optimization of the novel shaped hole has been carried out to increase film-cooling effectiveness with four design variables, i.e., lateral expansion of the diffuser, forward expansion angle of the hole, length to diameter ratio of the hole, and pitch to diameter ratio of the hole. To optimize the hole shape, the radial basis neural network model is constructed and sequential quadratic programming is used to find optimal point from the surrogate model. The novel shaped hole shows remarkably improved film-cooling performance in comparison with the other film-cooling holes. The novel shaped hole modified by the optimization gives enhanced performance in comparison with the reference geometry.
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ASME Turbo Expo 2012: Turbine Technical Conference and Exposition
June 11–15, 2012
Copenhagen, Denmark
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-4470-0
PROCEEDINGS PAPER
Numerical Analysis of Film-Cooling Performance and Optimization for a Novel Shaped Film-Cooling Hole
Ki-Don Lee,
Ki-Don Lee
Inha University, Incheon, Republic of Korea
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Sun-Min Kim,
Sun-Min Kim
Inha University, Incheon, Republic of Korea
Search for other works by this author on:
Kwang-Yong Kim
Kwang-Yong Kim
Inha University, Incheon, Republic of Korea
Search for other works by this author on:
Ki-Don Lee
Inha University, Incheon, Republic of Korea
Sun-Min Kim
Inha University, Incheon, Republic of Korea
Kwang-Yong Kim
Inha University, Incheon, Republic of Korea
Paper No:
GT2012-68529, pp. 1345-1355; 11 pages
Published Online:
July 9, 2013
Citation
Lee, K, Kim, S, & Kim, K. "Numerical Analysis of Film-Cooling Performance and Optimization for a Novel Shaped Film-Cooling Hole." Proceedings of the ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. Volume 4: Heat Transfer, Parts A and B. Copenhagen, Denmark. June 11–15, 2012. pp. 1345-1355. ASME. https://doi.org/10.1115/GT2012-68529
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