Numerical Investigation of the Effects of Lattice Array Structures on Film Cooling Performance

To better understand the mechanism influencing the periodic lattice structures in gas turbine blade cooling, these numerical simulations present a systematic comparison of the effects in cases involving pin-fin, Kagome, and BCC lattice arrays on film-cooling effectiveness under three blowing ratios...

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Bibliographic Details
Main Authors: Chen, W. (Author), Chyu, M.K (Author), Fu, Q. (Author), Luo, X. (Author)
Format: Article
Language:English
Published: MDPI 2022
Subjects:
Online Access:View Fulltext in Publisher
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008 220718s2022 CNT 000 0 und d
020 |a 19961073 (ISSN) 
245 1 0 |a Numerical Investigation of the Effects of Lattice Array Structures on Film Cooling Performance 
260 0 |b MDPI  |c 2022 
856 |z View Fulltext in Publisher  |u https://doi.org/10.3390/en15134711 
520 3 |a To better understand the mechanism influencing the periodic lattice structures in gas turbine blade cooling, these numerical simulations present a systematic comparison of the effects in cases involving pin-fin, Kagome, and BCC lattice arrays on film-cooling effectiveness under three blowing ratios (i.e., M = 0.5, 1.0, and 1.5). The results indicate that the introduction of lattice array structures improves film-cooling effectiveness within the whole streamwise range, especially downstream of the film hole. With an increase in the blowing ratio, the superiority of lattice array structures relative to those without a lattice becomes increasingly evident. The local film-cooling effectiveness can be increased, to a maximum of about 100%, under a blowing ratio of 1.5. The secondary flow induced by the lattice array structure at the internal flow channel increases the TKE and accelerates the development of vortices in the film cooling hole. Using the lattice array model, the improvement of the Kagome and BCC lattice arrays in terms of film cooling is better than those of pin-fins. In addition, the effect of lattice arrays on film-cooling effectiveness is different at various blowing ratios, and the lattice array structures have little impact on the film cooling at a relatively low blowing ratio. © 2022 by the authors. Licensee MDPI, Basel, Switzerland. 
650 0 4 |a Array structures 
650 0 4 |a blow ratio 
650 0 4 |a Blow ratio 
650 0 4 |a Blowing ratio 
650 0 4 |a Channel flow 
650 0 4 |a cross flow 
650 0 4 |a Cross flows 
650 0 4 |a Crystal structure 
650 0 4 |a film cooling 
650 0 4 |a Film cooling 
650 0 4 |a Film cooling effectiveness 
650 0 4 |a Fins (heat exchange) 
650 0 4 |a flow structure 
650 0 4 |a Kagome lattice 
650 0 4 |a lattice array structure 
650 0 4 |a Lattice array structure 
650 0 4 |a Lattice arrays 
650 0 4 |a Pin-fins 
650 0 4 |a Turbomachine blades 
700 1 |a Chen, W.  |e author 
700 1 |a Chyu, M.K.  |e author 
700 1 |a Fu, Q.  |e author 
700 1 |a Luo, X.  |e author 
773 |t Energies