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An inverse optimiza...
An inverse optimization of turbulent flow and heat transfer for a cooling passage with hierarchically arranged ribs in turbine blades
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- Zheng, Shao Fei (author)
- North China Electric Power University
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- Lian, We Kai (author)
- North China Electric Power University
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- Meng, Jia Xing (author)
- North China Electric Power University
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- Wang, He Chen (author)
- North China Electric Power University
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- Gao, Shu Rong (author)
- North China Electric Power University
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- Yang, Yan Ru (author)
- North China Electric Power University
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- Li, Hai Wang (author)
- Beihang University
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- Sunden, Bengt (author)
- Lund University,Lunds universitet,Värmeöverföring,Institutionen för energivetenskaper,Institutioner vid LTH,Lunds Tekniska Högskola,Heat Transfer,Department of Energy Sciences,Departments at LTH,Faculty of Engineering, LTH
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- Wang, Xiao Dong (author)
- North China Electric Power University
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(creator_code:org_t)
- 2024
- 2024
- English.
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In: International Journal of Heat and Mass Transfer. - 0017-9310. ; 220
- Related links:
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http://dx.doi.org/10...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Owing to the limited cold-air amount and pressure in supply systems, high-efficient heat transfer with low-level friction loss is highly desired for cooling units of a turbine blade. To exploit the potential improvement of hierarchically arranged ribs in cooling passages proposed previously, multi-parameter optimizations for rib arrangements are implemented by integrating the simplified conjugate-gradient algorithm with the turbulent flow and heat transfer model. Rib heights as design variables are optimized with various performance indices as objective functions at a fixed Re. The optimizations confirm that using the wall temperature difference and Nu as the objective function, respectively, a limited heat transfer improvement is achieved with a greatly increased friction loss. Taking the overall performance factor as the objective function, different optimal designs at different constraint conditions possess hierarchical characteristics. A significant friction loss reduction of 52.1%, 54.7%, and 54.8%, is achieved with a moderate heat transfer loss of 10.9%, 7.0%, and 2.3%. Despite different thermal and friction performances, their overall performances are consistent with a remarkable increase of 13.9%, 21.2%, and 27.3%. Finally, the optimization strategy coupling the multi-parameter optimization and hierarchical scheme is confirmed as effective for enhancing the thermohydraulic performance of convective heat transfer systems with perturbation elements.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Energiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Energy Engineering (hsv//eng)
Keyword
- Hierarchical arrangement of ribs
- Optimization
- Simplified conjugate-gradient algorithm
- Turbine blade internal cooling
- Turbulent flow and heat transfer
Publication and Content Type
- art (subject category)
- ref (subject category)
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