Swirl and Jet Flow Interaction over Film-Cooling Plates

Date

2026-01-01

Author

Arslan Arslane@Metu.Edu.Tr, Enes
Başkan Perçin, Özge
Perçin, Mustafa
Uzol, Oğuz
Turkeri, Hasret

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This study experimentally investigates the film-cooling effectiveness and associated flowfield characteristics of two plate geometries subjected to both uniform and swirling inflow conditions. The first configuration is a flat plate with a single row of cylindrical film-cooling holes, whereas the second features an angled-leap surface that forms a continuous slot through which coolant is injected. The experiments are performed in a heated-air wind tunnel, where surface temperature distributions are quantified using infrared thermography and the coolant–mainstream interaction is characterized using two-dimensional, two-component particle image velocimetry. Swirling inflows are generated using an axial swirler adopted from the literature. The results show that swirl significantly alters coolant-jet behavior by inducing lateral deflection and early lift-off, particularly at low blowing ratios. In contrast, the angled-leap slot configuration provides more spatially continuous and persistent cooling coverage under both uniform and swirling inflows, indicating improved resilience to swirl-dominated crossflow conditions. These findings highlight the potential benefits of slot-type angled-leap designs for film-cooling applications in environments where strong swirl effects are present.

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https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=105031181845&origin=inward
https://hdl.handle.net/11511/118858

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Department of Aerospace Engineering, Conference / Seminar