Assessment of the improved cooling effectiveness of modified film holes supplied by the front cavity on a vane
Vanes are generally supplied with coolant through multiple cavities. Improving film holes supplied by the front cavity can impact the overall film coverage on the vane. In this study, the deficiencies of the film cooling characteristics were analyzed. This study aimed to increase the number of film...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-09-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X25008226 |
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| author | Fei Zeng Lin Ye Yang Li Wei Li Cunliang Liu Fan Zhang |
| author_facet | Fei Zeng Lin Ye Yang Li Wei Li Cunliang Liu Fan Zhang |
| author_sort | Fei Zeng |
| collection | DOAJ |
| description | Vanes are generally supplied with coolant through multiple cavities. Improving film holes supplied by the front cavity can impact the overall film coverage on the vane. In this study, the deficiencies of the film cooling characteristics were analyzed. This study aimed to increase the number of film holes supplied by the front cavity of a vane, and two improved models (Vanes I and II) were proposed. The holes on the suction side were improved to 11–11–11 holes in the improved models. The showerhead hole diameter on Vane I increased by 25 %. The showerhead holes on Vane II were changed to laidback holes. The most upstream holes on the pressure surface of both improved models were changed to 11–11–11 holes. The enhanced effective cooling of the improved models under different mass flux ratios and turbulence intensities was evaluated. Compared with the original vane, Vanes I and II exhibited significantly improved effective film cooling on the showerhead and suction surfaces. The amount of film cooling also increased on the pressure surface near the showerhead. This improvement gradually decreased along the flow direction. Under different mainstream parameters, the effective film cooling rates of Vanes I and II both increased by more than 32 %. Moreover, Vane II was more resistant to turbulence intensities and mass flux ratios. |
| format | Article |
| id | doaj-art-dd938f5f86a5476db8f48da7b82942d7 |
| institution | Kabale University |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-dd938f5f86a5476db8f48da7b82942d72025-08-20T03:32:19ZengElsevierCase Studies in Thermal Engineering2214-157X2025-09-017310656210.1016/j.csite.2025.106562Assessment of the improved cooling effectiveness of modified film holes supplied by the front cavity on a vaneFei Zeng0Lin Ye1Yang Li2Wei Li3Cunliang Liu4Fan Zhang5AECC Hunan Aviation Powerplant Research Institute, Zhuzhou, 412002, ChinaSchool of Power and Energy, Northwestern Polytechnical University, Xi'an, 710072, China; Advanced Power Research Institute of Northwestern Polytechnical University in Sichuan Tianfu New Area, Chengdu, 610213, China; Corresponding author. School of Power and Energy, Northwestern Polytechnical University, Xi'an, 710072, China.AECC Hunan Aviation Powerplant Research Institute, Zhuzhou, 412002, ChinaAECC Hunan Aviation Powerplant Research Institute, Zhuzhou, 412002, ChinaSchool of Power and Energy, Northwestern Polytechnical University, Xi'an, 710072, China; Advanced Power Research Institute of Northwestern Polytechnical University in Sichuan Tianfu New Area, Chengdu, 610213, ChinaScience and Technology on Space Physics Laboratory, China Academy of Launch Vehicle Technology, Beijing, 100076, ChinaVanes are generally supplied with coolant through multiple cavities. Improving film holes supplied by the front cavity can impact the overall film coverage on the vane. In this study, the deficiencies of the film cooling characteristics were analyzed. This study aimed to increase the number of film holes supplied by the front cavity of a vane, and two improved models (Vanes I and II) were proposed. The holes on the suction side were improved to 11–11–11 holes in the improved models. The showerhead hole diameter on Vane I increased by 25 %. The showerhead holes on Vane II were changed to laidback holes. The most upstream holes on the pressure surface of both improved models were changed to 11–11–11 holes. The enhanced effective cooling of the improved models under different mass flux ratios and turbulence intensities was evaluated. Compared with the original vane, Vanes I and II exhibited significantly improved effective film cooling on the showerhead and suction surfaces. The amount of film cooling also increased on the pressure surface near the showerhead. This improvement gradually decreased along the flow direction. Under different mainstream parameters, the effective film cooling rates of Vanes I and II both increased by more than 32 %. Moreover, Vane II was more resistant to turbulence intensities and mass flux ratios.http://www.sciencedirect.com/science/article/pii/S2214157X25008226Film coolingTurbine vaneTurbulence intensityMass flux ratioFilm hole improvement |
| spellingShingle | Fei Zeng Lin Ye Yang Li Wei Li Cunliang Liu Fan Zhang Assessment of the improved cooling effectiveness of modified film holes supplied by the front cavity on a vane Case Studies in Thermal Engineering Film cooling Turbine vane Turbulence intensity Mass flux ratio Film hole improvement |
| title | Assessment of the improved cooling effectiveness of modified film holes supplied by the front cavity on a vane |
| title_full | Assessment of the improved cooling effectiveness of modified film holes supplied by the front cavity on a vane |
| title_fullStr | Assessment of the improved cooling effectiveness of modified film holes supplied by the front cavity on a vane |
| title_full_unstemmed | Assessment of the improved cooling effectiveness of modified film holes supplied by the front cavity on a vane |
| title_short | Assessment of the improved cooling effectiveness of modified film holes supplied by the front cavity on a vane |
| title_sort | assessment of the improved cooling effectiveness of modified film holes supplied by the front cavity on a vane |
| topic | Film cooling Turbine vane Turbulence intensity Mass flux ratio Film hole improvement |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X25008226 |
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