Pin-fin shape and orientation effects on wall heat transfer predictions of gas turbine blade

Effendy, Marwan; Yao, Yufeng; Yao, Jun; Marchant, Denis R.

Abstract

Turbine blades are often exposed to the ‘hot’ gas environment and thus it is essential to apply effective cooling technique to extend the blade lifetime. In the present work, wall heat transfer characteristics inside a blade trailing-edge coolant passage were investigated by analyzing two baseline configurations experimentally studied by previous researchers. In addition, three new configurations were proposed by varying shape and orientation against an incoming airflow. All these five configurations adopted similar layout with five-row elliptic pin-fins in the main coolant region and one-row fillet circular pin-fin in the exit region. Validation study was started by two baseline configurations by comparing CFD predictions with experimental measurements, followed by wall heat transfer predictions of three newly proposed configurations. It was found that pin-fin shape and its orientation have considerable effects on the wall heat transfer characteristics, and that by rotating the pin-fin against incoming flow, some compromises could be achieved, such as higher heat transfer coefficient and lower pressure loss.

Citation

Effendy, M., Yao, Y., Yao, J., & Marchant, D. R. (2019). Pin-fin shape and orientation effects on wall heat transfer predictions of gas turbine blade. In EXPLORING RESOURCES, PROCESS AND DESIGN FOR SUSTAINABLE URBAN DEVELOPMENT: Proceedings of the 5th International Conference on Engineering, Technology, and Industrial Application (ICETIA) 2018 (020008). https://doi.org/10.1063/1.5112392

• 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: 020008
• 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
• ISBN: 9780735418509
• DOI: https://doi.org/10.1063/1.5112392
• Keywords: combustion engine, thermodynamic states, thermodynamic processes
• Public URL: https://uwe-repository.worktribe.com/output/1492381
• Publisher URL: http://doi.org/10.1063/1.5112392
• 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, 020008 (2019) and may be found at https://aip.scitation.org/doi/abs/10.1063/1.5112392; Title of Conference or Conference Proceedings : AIP Conference Proceedings 2114, 020008 (2019)