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Open AccessArticle

Heat Transfer Designed for Bionic Surfaces with Rib Turbulators Inspired by Alopias Branchial Arch in a Simplified Gas Turbine Transition Piece

1
School of Mechanical Science and Engineering, Jilin University, Changchun 130022, China
2
Key Lab of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130022, China
3
College of Aviation Warfare Service, Aviation University of Air Force, Changchun 130022, China
*
Author to whom correspondence should be addressed.
Appl. Sci. 2018, 8(5), 820; https://doi.org/10.3390/app8050820
Received: 26 March 2018 / Revised: 12 May 2018 / Accepted: 16 May 2018 / Published: 19 May 2018
(This article belongs to the Section Mechanical Engineering)
The energy needed for highly efficient heat transfer has shown a continuous growth, as the energy reduction. For highly efficient power convection, gas turbine is an important device at present. But, the design of highly efficient gas turbine is limited by the temperature and the material’s temperature resistance around the inlet. One part of the inlet need to be protected from burning out is transition piece. A bionic thermal surface with rib turbulators is designed according to the turbulence function of alopias’ branchial arches and is evaluated for thermo-protection enhancement in a simplified gas turbine transition piece using computational fluid dynamics (CFD) simulation. With the given diameter (Φ = 10.26 mm) of the impinging hole, three different horizontal distances (S) from impinging holes to the front of first-row rib were solved, which were S1 = 20 mm, S2 = 40 mm, and S3 = 60 mm, respectively, in case 1. But, the results revealed that S is not a significant influence factor on heat transfer efficiency. The cooling coefficient increases from 0.194 to 0.198 when the distance varies from S1 to S3. In case 2, rib turbulator width (W) and height (H) have been studied in ranges from 0.5 × Φ to 1.5 × Φ. All of the numerical results indicated that the best size of the rib turbulators could improve the heat transfer efficiency to 32.5%, when comparing with the smooth surface. All of the comparisons will benefit the structural design of heat transfer, which could be used for solving more severe problems in thermo-protection. View Full-Text
Keywords: computational fluid dynamics (CFD); numerical simulation; convective heat transfer; gas turbine; simplified transition piece model; bionic thermal surface computational fluid dynamics (CFD); numerical simulation; convective heat transfer; gas turbine; simplified transition piece model; bionic thermal surface
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Guo, H.; Liang, X.; Yu, Z.; Xu, T.; Zhang, T.; Liu, H.; Ma, L. Heat Transfer Designed for Bionic Surfaces with Rib Turbulators Inspired by Alopias Branchial Arch in a Simplified Gas Turbine Transition Piece. Appl. Sci. 2018, 8, 820.

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