Shape optimization of a bended film-cooling hole to enhance cooling effectiveness
To improve cooling effectiveness of film-cooling hole, bending of hole was investigated and optimized using surrogate modelling based on three-dimensional Reynolds-averaged Navier-Stokes analysis. The turbulence was modeled using a shear stress transport model. The spatially-averaged film-cooling ef...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
The Japan Society of Mechanical Engineers
2019-06-01
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| Series: | Journal of Thermal Science and Technology |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jtst/14/1/14_2019jtst0011/_pdf/-char/en |
| _version_ | 1818287056773709824 |
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| author | Jun-Hee KIM Kwang-Yong KIM |
| author_facet | Jun-Hee KIM Kwang-Yong KIM |
| author_sort | Jun-Hee KIM |
| collection | DOAJ |
| description | To improve cooling effectiveness of film-cooling hole, bending of hole was investigated and optimized using surrogate modelling based on three-dimensional Reynolds-averaged Navier-Stokes analysis. The turbulence was modeled using a shear stress transport model. The spatially-averaged film-cooling effectiveness was employed as the objective function, and the injection angles of the lower and upper cylindrical parts and height of the bending point were selected as design variables for optimization. The Kriging model was used to approximate the objective function. 27 design points were selected by the Latin hypercube sampling, where objective function values were calculated to construct the surrogate models. The results at a blowing ratio of 0.5 showed that the optimum bended film-cooling hole improved the spatially-averaged film-cooling effectiveness by 39.9 % and 78.0 % compared to a reference bended hole and a cylindrical hole, respectively. |
| first_indexed | 2024-12-13T01:34:25Z |
| format | Article |
| id | doaj.art-bc8a9a0452d04894bc782353759aa074 |
| institution | Directory Open Access Journal |
| issn | 1880-5566 |
| language | English |
| last_indexed | 2024-12-13T01:34:25Z |
| publishDate | 2019-06-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Journal of Thermal Science and Technology |
| spelling | doaj.art-bc8a9a0452d04894bc782353759aa0742022-12-22T00:03:55ZengThe Japan Society of Mechanical EngineersJournal of Thermal Science and Technology1880-55662019-06-01141JTST0011JTST001110.1299/jtst.2019jtst0011jtstShape optimization of a bended film-cooling hole to enhance cooling effectivenessJun-Hee KIM0Kwang-Yong KIM1Department of Mechanical Engineering, Inha UniversityDepartment of Mechanical Engineering, Inha UniversityTo improve cooling effectiveness of film-cooling hole, bending of hole was investigated and optimized using surrogate modelling based on three-dimensional Reynolds-averaged Navier-Stokes analysis. The turbulence was modeled using a shear stress transport model. The spatially-averaged film-cooling effectiveness was employed as the objective function, and the injection angles of the lower and upper cylindrical parts and height of the bending point were selected as design variables for optimization. The Kriging model was used to approximate the objective function. 27 design points were selected by the Latin hypercube sampling, where objective function values were calculated to construct the surrogate models. The results at a blowing ratio of 0.5 showed that the optimum bended film-cooling hole improved the spatially-averaged film-cooling effectiveness by 39.9 % and 78.0 % compared to a reference bended hole and a cylindrical hole, respectively.https://www.jstage.jst.go.jp/article/jtst/14/1/14_2019jtst0011/_pdf/-char/enfilm-cooling holebended film cooling holeoptimizationfilm cooling effectivenessreynolds averaged navier-stokes equationssurrogated model |
| spellingShingle | Jun-Hee KIM Kwang-Yong KIM Shape optimization of a bended film-cooling hole to enhance cooling effectiveness Journal of Thermal Science and Technology film-cooling hole bended film cooling hole optimization film cooling effectiveness reynolds averaged navier-stokes equations surrogated model |
| title | Shape optimization of a bended film-cooling hole to enhance cooling effectiveness |
| title_full | Shape optimization of a bended film-cooling hole to enhance cooling effectiveness |
| title_fullStr | Shape optimization of a bended film-cooling hole to enhance cooling effectiveness |
| title_full_unstemmed | Shape optimization of a bended film-cooling hole to enhance cooling effectiveness |
| title_short | Shape optimization of a bended film-cooling hole to enhance cooling effectiveness |
| title_sort | shape optimization of a bended film cooling hole to enhance cooling effectiveness |
| topic | film-cooling hole bended film cooling hole optimization film cooling effectiveness reynolds averaged navier-stokes equations surrogated model |
| url | https://www.jstage.jst.go.jp/article/jtst/14/1/14_2019jtst0011/_pdf/-char/en |
| work_keys_str_mv | AT junheekim shapeoptimizationofabendedfilmcoolingholetoenhancecoolingeffectiveness AT kwangyongkim shapeoptimizationofabendedfilmcoolingholetoenhancecoolingeffectiveness |