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- W3198939444 abstract "Abstract Sequential impingement channels can reduce the adverse effect of crossflow in narrow impingement channels, as well as increase the cooling efficiency. In this work, sequential impingement channels are experimentally investigated using the transient liquid crystal technique to assess their thermal performances. A low heat transfer region is identified in the downstream part of the first channel where the flow is discharged into the second plenum. Various means of increasing the heat transfer at this location are investigated. Ribs on the target plate allow for an increase of the average heat transfer coefficient with small losses in pressure. Reducing the channel cross-section increases the mean flow velocity and, combined with the ribs, allows for a further increase of the heat transfer. Additionally, the geometrical changes of the channel caused by the addition of a ramp with a rounded corner, allow to decrease the pressure losses associated with the discharge into the second plenum, which is not optimal in the baseline configuration due to the sharp corner of the purge hole. Further reducing the cross-section to increase the heat transfer, however, increases the pressure losses due to the small open area in the transition zone." @default.
- W3198939444 created "2021-09-27" @default.
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- W3198939444 date "2021-06-07" @default.
- W3198939444 modified "2023-10-03" @default.
- W3198939444 title "Heat Transfer Enhancement in a Double Sequential Impingement Channel" @default.
- W3198939444 doi "https://doi.org/10.1115/gt2021-58913" @default.
- W3198939444 hasPublicationYear "2021" @default.
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