Conjugate heat transfer in wedged latticework cooling ducts with ejection flow for turbine blades
Trailing edge of high temperature turbine blades faces challenge of severe thermal environment due to wedged profile and hence limited cooling spaces. Latticework is a competitive cooling scheme which provides superior structural strength and heat transfer enhancement level, thereby having potential...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-01-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X24016526 |
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| author | Binye Yu Xingwei Li Jie Li Shi Bu |
| author_facet | Binye Yu Xingwei Li Jie Li Shi Bu |
| author_sort | Binye Yu |
| collection | DOAJ |
| description | Trailing edge of high temperature turbine blades faces challenge of severe thermal environment due to wedged profile and hence limited cooling spaces. Latticework is a competitive cooling scheme which provides superior structural strength and heat transfer enhancement level, thereby having potential to be used for trailing edge cooling. Besides, conjugate heat transfer characteristics within wedged latticework ducts must be clarified to achieve advanced design. This work fills the gap between geometric complexity and simultaneous consideration of convective-conductive heat transfer. Influence factors including ejection flow configuration, wedge angle and ejection hole dimensions are investigated in sequence in terms of cooling efficiency, temperature distribution, thermo-hydrodynamic performance, relative temperature deviation and thermal-mechanical behavior. The result indicates that heat transfer can be improved by 80 % via optimizing ejection flow configuration. Increasing wedge angle helps enhance heat transfer under the effect of lateral ejection. Expanding ejection hole dimension by varying aspect ratio leads to better thermo-hydrodynamic performance. Besides, structure thermal stress shows a consistent trend with the relative temperature deviation. These findings highlight the role of conjugate heat transfer in trailing edge cooling, also provide guidelines for designing of similar micro-channel heat exchangers where both thermal capability and uniformity are of great importance. |
| format | Article |
| id | doaj-art-764214e7584f467cbfe726d5022063c3 |
| institution | Kabale University |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-764214e7584f467cbfe726d5022063c32025-01-08T04:52:41ZengElsevierCase Studies in Thermal Engineering2214-157X2025-01-0165105621Conjugate heat transfer in wedged latticework cooling ducts with ejection flow for turbine bladesBinye Yu0Xingwei Li1Jie Li2Shi Bu3School of Mechanical Engineering and Rail Transit, Changzhou University, Changzhou, 213164, ChinaSchool of Mechanical Engineering and Rail Transit, Changzhou University, Changzhou, 213164, ChinaSchool of Mechanical Engineering and Rail Transit, Changzhou University, Changzhou, 213164, ChinaSchool of Mechanical Engineering and Rail Transit, Changzhou University, Changzhou, 213164, China; Jiangsu Key Laboratory of Green Process Equipment, Changzhou University, Changzhou 213164, China; Corresponding author;Jiangsu Key Laboratory of Green Process Equipment, Changzhou University, Changzhou 213164, ChinaTrailing edge of high temperature turbine blades faces challenge of severe thermal environment due to wedged profile and hence limited cooling spaces. Latticework is a competitive cooling scheme which provides superior structural strength and heat transfer enhancement level, thereby having potential to be used for trailing edge cooling. Besides, conjugate heat transfer characteristics within wedged latticework ducts must be clarified to achieve advanced design. This work fills the gap between geometric complexity and simultaneous consideration of convective-conductive heat transfer. Influence factors including ejection flow configuration, wedge angle and ejection hole dimensions are investigated in sequence in terms of cooling efficiency, temperature distribution, thermo-hydrodynamic performance, relative temperature deviation and thermal-mechanical behavior. The result indicates that heat transfer can be improved by 80 % via optimizing ejection flow configuration. Increasing wedge angle helps enhance heat transfer under the effect of lateral ejection. Expanding ejection hole dimension by varying aspect ratio leads to better thermo-hydrodynamic performance. Besides, structure thermal stress shows a consistent trend with the relative temperature deviation. These findings highlight the role of conjugate heat transfer in trailing edge cooling, also provide guidelines for designing of similar micro-channel heat exchangers where both thermal capability and uniformity are of great importance.http://www.sciencedirect.com/science/article/pii/S2214157X24016526Latticework coolingWedged ductConjugate heat transferEjection flowNumerical simulation |
| spellingShingle | Binye Yu Xingwei Li Jie Li Shi Bu Conjugate heat transfer in wedged latticework cooling ducts with ejection flow for turbine blades Case Studies in Thermal Engineering Latticework cooling Wedged duct Conjugate heat transfer Ejection flow Numerical simulation |
| title | Conjugate heat transfer in wedged latticework cooling ducts with ejection flow for turbine blades |
| title_full | Conjugate heat transfer in wedged latticework cooling ducts with ejection flow for turbine blades |
| title_fullStr | Conjugate heat transfer in wedged latticework cooling ducts with ejection flow for turbine blades |
| title_full_unstemmed | Conjugate heat transfer in wedged latticework cooling ducts with ejection flow for turbine blades |
| title_short | Conjugate heat transfer in wedged latticework cooling ducts with ejection flow for turbine blades |
| title_sort | conjugate heat transfer in wedged latticework cooling ducts with ejection flow for turbine blades |
| topic | Latticework cooling Wedged duct Conjugate heat transfer Ejection flow Numerical simulation |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X24016526 |
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