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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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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1721518926412644352 |