Effect of rib spacing on heat transfer and friction in a rotating two-pass square channel with asymmetrical 90-deg rib turbulators

Xu, Guoqiang; Li, Yang; Deng, Hongwu

doi:10.1016/j.applthermaleng.2015.02.011

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Cited by 37 publications

(2 citation statements)

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“…1 and was previously used by Deng et al [8,14,[26][27][28][29]. Three main modules are included in the whole test rotating: the air circulation module, support module and temperature measurements module.…”

Section: Rotating Facilitiesmentioning

confidence: 99%

Heat transfer study in a rotating ribbed two-pass channel with engine-similar cross section at high rotation number

Tao

Yang

Deng

et al. 2016

Applied Thermal Engineering

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Section: Rotating Facilitiesmentioning

confidence: 99%

Heat transfer study in a rotating ribbed two-pass channel with engine-similar cross section at high rotation number

Tao

Yang

Deng

et al. 2016

Applied Thermal Engineering

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“…The most common for modern cooling system is the use of ribs arranged at different angles. The authors of [19,20] experimentally studied the ribs' type impact on the density of the heat exchange process in more detail. V-shaped ribs at 60 • and 45 • ensured the maximum heat loss.…”

mentioning

confidence: 99%

Asymmetric Method of Heat Transfer Intensification in Radial Channels of Gas Turbine Blades

Osipov

Rogalev

et al. 2022

Inventions

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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.

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Effect of Blockage Ratio on Heat Transfer and Pressure Drop in Rotating Ribbed Channels at High Rotation Numbers

Deng

Tao

et al. 2020

J. Therm. Sci.

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Effect of rib spacing on heat transfer and friction in a rotating two-pass square channel with asymmetrical 90-deg rib turbulators

Cited by 37 publications

References 33 publications

Heat transfer study in a rotating ribbed two-pass channel with engine-similar cross section at high rotation number

Heat transfer study in a rotating ribbed two-pass channel with engine-similar cross section at high rotation number

Asymmetric Method of Heat Transfer Intensification in Radial Channels of Gas Turbine Blades

Effect of Blockage Ratio on Heat Transfer and Pressure Drop in Rotating Ribbed Channels at High Rotation Numbers

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