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- W4311784513 abstract "Loop and semi-loop cooling schemes are widely used for the high-temperature gas turbine blades. In such schemes, the mid-chord airfoil parts are traditionally cooled by radial channels with ribbed walls. The blades with a small specific span, or “short” blades, have different heat flux amounts on pressure and suction sides, which results in a temperature difference in these sides of 100–150 °K. This difference causes thermal stresses and reduces the long-term strength margins. This paper presents a new method of heat transfer intensification in the ribbed radial cooling channels. The method is based on air streams’ injection through holes in the ribs that split channels. The streams are directed along the walls into the stagnation zones behind the ribs. The results of a 3D coolant flow simulation with ANSYS CFX code show the influence of the geometry parameters upon the channel heat transfer asymmetry. In the Reynolds number within a range of 6000–20,000, the method provides the heat transfer augmentation difference by up to 40% on the opposite channel walls. Test results presented in the criteria relations form allow for the calculation of mean the heat transfer coefficient along the channel length." @default.
- W4311784513 created "2022-12-28" @default.
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- W4311784513 date "2022-12-07" @default.
- W4311784513 modified "2023-09-26" @default.
- W4311784513 title "Asymmetric Method of Heat Transfer Intensification in Radial Channels of Gas Turbine Blades" @default.
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- W4311784513 doi "https://doi.org/10.3390/inventions7040117" @default.
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