Investigation of the Film-Cooling Performance of 2.5D Braided Ceramic Matrix Composite Plates with Preformed Hole

The film-cooling performance of a 2.5D braided ceramic matrix composite (CMC) plate with preformed holes was numerically studied. Four numerical models containing braided structures were established: one model with film-cooling holes preformed through fiber extrusion deformation (EP-Hole), one model...

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Main Authors: Chenwei Zhao, Zecan Tu, Junkui Mao
Format: Article
Language:English
Published: MDPI AG 2021-04-01
Series:Aerospace
Subjects:
Online Access:https://www.mdpi.com/2226-4310/8/4/116
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spelling doaj-332392e4b7324be59ac2e6a0d11b1ad12021-04-19T23:03:19ZengMDPI AGAerospace2226-43102021-04-01811611610.3390/aerospace8040116Investigation of the Film-Cooling Performance of 2.5D Braided Ceramic Matrix Composite Plates with Preformed HoleChenwei Zhao0Zecan Tu1Junkui Mao2Jiangsu Province Key Laboratory of Aerospace Power System, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaJiangsu Province Key Laboratory of Aerospace Power System, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaJiangsu Province Key Laboratory of Aerospace Power System, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaThe film-cooling performance of a 2.5D braided ceramic matrix composite (CMC) plate with preformed holes was numerically studied. Four numerical models containing braided structures were established: one model with film-cooling holes preformed through fiber extrusion deformation (EP-Hole), one model with film-cooling holes directly woven through fibers (WP-Hole), and two models with directly drilled holes (DP-Hole1,2). Besides, the influence of the ratio between the equivalent thermal conductivities on the axial and radial directions of fiber Kr was investigated. The results show that the preformed holes have better performance in controlling the thermal gradient with the increase of Kr. The maximum thermal gradient around the DP-Hole is significantly higher than that of the WP-Hole and EP-Hole, and the maximum relative variation reaches 123.3%. With Kr increasing from 3.32 to 13.05, the overall cooling effectiveness on the hot-side wall decreases for all models, by about 10%. Compared with the traditional drill method, the new preformed film-cooling hole studied in this paper can reduce the temperature and the thermal gradient in the region around the holes.https://www.mdpi.com/2226-4310/8/4/116film coolinganisotropic thermal conductivity2.5D braided compositepreformed hole
collection DOAJ
language English
format Article
sources DOAJ
author Chenwei Zhao
Zecan Tu
Junkui Mao
spellingShingle Chenwei Zhao
Zecan Tu
Junkui Mao
Investigation of the Film-Cooling Performance of 2.5D Braided Ceramic Matrix Composite Plates with Preformed Hole
Aerospace
film cooling
anisotropic thermal conductivity
2.5D braided composite
preformed hole
author_facet Chenwei Zhao
Zecan Tu
Junkui Mao
author_sort Chenwei Zhao
title Investigation of the Film-Cooling Performance of 2.5D Braided Ceramic Matrix Composite Plates with Preformed Hole
title_short Investigation of the Film-Cooling Performance of 2.5D Braided Ceramic Matrix Composite Plates with Preformed Hole
title_full Investigation of the Film-Cooling Performance of 2.5D Braided Ceramic Matrix Composite Plates with Preformed Hole
title_fullStr Investigation of the Film-Cooling Performance of 2.5D Braided Ceramic Matrix Composite Plates with Preformed Hole
title_full_unstemmed Investigation of the Film-Cooling Performance of 2.5D Braided Ceramic Matrix Composite Plates with Preformed Hole
title_sort investigation of the film-cooling performance of 2.5d braided ceramic matrix composite plates with preformed hole
publisher MDPI AG
series Aerospace
issn 2226-4310
publishDate 2021-04-01
description The film-cooling performance of a 2.5D braided ceramic matrix composite (CMC) plate with preformed holes was numerically studied. Four numerical models containing braided structures were established: one model with film-cooling holes preformed through fiber extrusion deformation (EP-Hole), one model with film-cooling holes directly woven through fibers (WP-Hole), and two models with directly drilled holes (DP-Hole1,2). Besides, the influence of the ratio between the equivalent thermal conductivities on the axial and radial directions of fiber Kr was investigated. The results show that the preformed holes have better performance in controlling the thermal gradient with the increase of Kr. The maximum thermal gradient around the DP-Hole is significantly higher than that of the WP-Hole and EP-Hole, and the maximum relative variation reaches 123.3%. With Kr increasing from 3.32 to 13.05, the overall cooling effectiveness on the hot-side wall decreases for all models, by about 10%. Compared with the traditional drill method, the new preformed film-cooling hole studied in this paper can reduce the temperature and the thermal gradient in the region around the holes.
topic film cooling
anisotropic thermal conductivity
2.5D braided composite
preformed hole
url https://www.mdpi.com/2226-4310/8/4/116
work_keys_str_mv AT chenweizhao investigationofthefilmcoolingperformanceof25dbraidedceramicmatrixcompositeplateswithpreformedhole
AT zecantu investigationofthefilmcoolingperformanceof25dbraidedceramicmatrixcompositeplateswithpreformedhole
AT junkuimao investigationofthefilmcoolingperformanceof25dbraidedceramicmatrixcompositeplateswithpreformedhole
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