Numerical study of pin-fin cooling on gas turbine blades

Effendy, Marwan; Yao, Yufeng; Sugati, Daru; Tjahjono, Tri

Abstract

This paper describes a numerical study of internal pin-fin cooling performance of a trailing-edge cutback configuration for gas turbine blade. The study was performed at two steps: first, to validate simulation results from an existing TE cutback cooling with staggered pin-fin arrays inside the cooling passage against experimental measurements. Three structured meshes were used for grid convergence and to evaluate film-cooling effectiveness and discharge coefficient; second, to investigate the pin-fin cooling performance with various blowing ratios. Simulations were performed by keeping the same initial and boundary conditions as the corresponding experiment. The results show that validation can be considered acceptable by keeping quality grid and its resolution in near wall regions. Both computational data of the adiabatic film-cooling effectiveness and the discharge coefficient are in fairly good agreement with the test data. The pin-fin array has important roles to promote flow turbulence activity inside the cooling passage, in addition to increase surface areas for heat transfer. Hence the turbulence intensity is more pronounced due to the existence of the pin-fin and it is concomitant with the coolant flow inside the wedge-shaped duct.

• Presentation Conference Type: Conference Paper (published)
• Acceptance Date: Jun 26, 2019
• Online Publication Date: Jun 26, 2019
• Publication Date: Jun 26, 2019
• Deposit Date: Jul 5, 2019
• Publicly Available Date: Jun 27, 2020
• Print ISSN: 0094-243X
• Publisher: AIP Publishing
• Peer Reviewed: Peer Reviewed
• Volume: 2114
• Pages: 060022
• Book Title: Exploring resources, process and design for sustainable urban development: Proceedings of the 5th International Conference on Engineering, Technology, and Industrial Application (ICETIA) 2018
• DOI: https://doi.org/10.1063/1.5112493
• Keywords: heat transfer performance, pin-fin arrays, turbulence flow motions
• Public URL: https://uwe-repository.worktribe.com/output/1492369
• Publisher URL: http://doi.org/10.1063/1.5112493
• Additional Information: Additional Information : This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in AIP Conference Proceedings 2114, 060022 (2019) and may be found at https://aip.scitation.org/doi/abs/10.1063/1.5112493; Title of Conference or Conference Proceedings : AIP Conference Proceedings 2114, 060022 (2019)
• Contract Date: Jul 5, 2019