Effects of Turbulence Promoters of Gas Turbine Blades on Film Cooling Performance
The effects of orientation of turbulence promoting ribs in the internal cooling air passage on the film cooling performance of outer surface of gas turbine blades have been studied experimentally. Both the adiabatic film cooling effectiveness and the heat transfer coefficient downstream of the film-...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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The Japan Society of Mechanical Engineers
2012-09-01
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| Series: | Journal of Thermal Science and Technology |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jtst/7/4/7_603/_pdf/-char/en |
| _version_ | 1811329558327066624 |
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| author | Yukiko AGATA Toshihiko TAKAHASHI Eiji SAKAI Koichi NISHINO |
| author_facet | Yukiko AGATA Toshihiko TAKAHASHI Eiji SAKAI Koichi NISHINO |
| author_sort | Yukiko AGATA |
| collection | DOAJ |
| description | The effects of orientation of turbulence promoting ribs in the internal cooling air passage on the film cooling performance of outer surface of gas turbine blades have been studied experimentally. Both the adiabatic film cooling effectiveness and the heat transfer coefficient downstream of the film-cooling hole of a flat plate were measured for two different orientations of the turbulence promoting ribs. It is found that the adiabatic film cooling effectiveness and heat transfer coefficient on the external surface are considerably affected by the inversion of the rib orientation in the internal passage. The film cooling performance is evaluated in terms of the net heat flux reduction and the net surface temperature reduction, both of which are calculated from the measurement of adiabatic film cooling effectiveness and heat transfer coefficient. The evaluation of these quantities has clarified the effects of the internal cooling structure on the film cooling performance. |
| first_indexed | 2024-04-13T15:46:00Z |
| format | Article |
| id | doaj.art-fc14965c49314ef380e8406165817bd2 |
| institution | Directory Open Access Journal |
| issn | 1880-5566 |
| language | English |
| last_indexed | 2024-04-13T15:46:00Z |
| publishDate | 2012-09-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Journal of Thermal Science and Technology |
| spelling | doaj.art-fc14965c49314ef380e8406165817bd22022-12-22T02:41:00ZengThe Japan Society of Mechanical EngineersJournal of Thermal Science and Technology1880-55662012-09-017460361810.1299/jtst.7.603jtstEffects of Turbulence Promoters of Gas Turbine Blades on Film Cooling PerformanceYukiko AGATA0Toshihiko TAKAHASHI1Eiji SAKAI2Koichi NISHINO3Central Research Institute of Electric Power IndustryCentral Research Institute of Electric Power IndustryCentral Research Institute of Electric Power IndustryDepartment of Mechanical Engineering, Graduate School of Engineering, Yokohama National UniversityThe effects of orientation of turbulence promoting ribs in the internal cooling air passage on the film cooling performance of outer surface of gas turbine blades have been studied experimentally. Both the adiabatic film cooling effectiveness and the heat transfer coefficient downstream of the film-cooling hole of a flat plate were measured for two different orientations of the turbulence promoting ribs. It is found that the adiabatic film cooling effectiveness and heat transfer coefficient on the external surface are considerably affected by the inversion of the rib orientation in the internal passage. The film cooling performance is evaluated in terms of the net heat flux reduction and the net surface temperature reduction, both of which are calculated from the measurement of adiabatic film cooling effectiveness and heat transfer coefficient. The evaluation of these quantities has clarified the effects of the internal cooling structure on the film cooling performance.https://www.jstage.jst.go.jp/article/jtst/7/4/7_603/_pdf/-char/engas turbine bladefilm coolingturbulence promoting ribheat transfer coefficientadiabatic film cooling effectivenessnet heat flux reductionnet surface temperature reduction |
| spellingShingle | Yukiko AGATA Toshihiko TAKAHASHI Eiji SAKAI Koichi NISHINO Effects of Turbulence Promoters of Gas Turbine Blades on Film Cooling Performance Journal of Thermal Science and Technology gas turbine blade film cooling turbulence promoting rib heat transfer coefficient adiabatic film cooling effectiveness net heat flux reduction net surface temperature reduction |
| title | Effects of Turbulence Promoters of Gas Turbine Blades on Film Cooling Performance |
| title_full | Effects of Turbulence Promoters of Gas Turbine Blades on Film Cooling Performance |
| title_fullStr | Effects of Turbulence Promoters of Gas Turbine Blades on Film Cooling Performance |
| title_full_unstemmed | Effects of Turbulence Promoters of Gas Turbine Blades on Film Cooling Performance |
| title_short | Effects of Turbulence Promoters of Gas Turbine Blades on Film Cooling Performance |
| title_sort | effects of turbulence promoters of gas turbine blades on film cooling performance |
| topic | gas turbine blade film cooling turbulence promoting rib heat transfer coefficient adiabatic film cooling effectiveness net heat flux reduction net surface temperature reduction |
| url | https://www.jstage.jst.go.jp/article/jtst/7/4/7_603/_pdf/-char/en |
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