This paper presents the optimization of an endwall boundary layer fence which improves the aerothermal characteristics of a gas turbine passage. The fence in a gas turbine passage effectively reduces secondary flow loss, which is generated in the cascade of the turbine. The turbine passage was simulated by a 90º turning duct (Re D =360,000). The main purpose of the present investigation was to focus on finding a boundary layer fence with minimum total pressure loss in the passage and heat transfer coefficient on the endwall of the duct. An approximate optimization method was used for the investigation to secure the computational efficiency. Design variables were the fence shape factors (fence thickness, fence height, and fence width) as well as the radial position on the passage endwall. Results indicated that a significant improvement in aerodynamic performance can be achieved through the application of an optimized boundary layer fence. The optimized design reduced the mass-weighted average total pressure loss in the duct by 8.6% relative to the duct without the fence. The area-weighted average maximum Nusselt number on the endwall of the optimized design was decreased by 2.5% in comparison with the duct without the fence.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.