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- W4385760434 abstract "Jet impingement cooling is a common technique for cooling the leading edge of turbine blades that experience high thermal loads. This study examines the effect of rotation on jet impingement cooling by conducting experiments in a rotating channel with a concave target surface. The dimensionless parameters of the jet configuration are 3 for both jet-to-jet spacing and jet-to-target surface spacing. The jet rotation number and jet buoyancy number reach a maximum of 0.26 and 0.63, respectively. The jet Reynolds number ranges between 5,000 and 15,000. The results show that a large vortex is generated in the supply channel due to the Coriolis force, which changes the mass-flowrate distribution in each jet hole. Therefore, the heat transfer in both ends increases while that in the middle region decreases, resulting in a U-shaped heat transfer distribution in the radial direction. In addition, the rotational Coriolis force is the dominant factor that affects the rotating jet impingement cooling, while the buoyancy force can affect heat transfer at high rotation numbers. The rotation-to-stationary Nusselt number ratio is defined to separate the effects of the Reynolds number, thus, the heat transfer correlations are developed between Nusselt number ratio and rotation number." @default.
- W4385760434 created "2023-08-12" @default.
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- W4385760434 date "2023-12-01" @default.
- W4385760434 modified "2023-09-27" @default.
- W4385760434 title "Heat transfer in a rotating impingement cooling channel with concave target surface" @default.
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- W4385760434 doi "https://doi.org/10.1016/j.ijheatmasstransfer.2023.124559" @default.
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