Advances in Film Cooling Heat Transfer

Acharya, Sumanta; Kanani, Yousef

doi:10.1016/bs.aiht.2017.10.001

Cited by 51 publications

(21 citation statements)

References 130 publications

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“…This will have detrimental effects on service life. However, the people associated with the designing and maintenance process (industrial researchers) of turbo machines are continuously improving the computational techniques [35].…”

Section: Advances In Gas Turbine Blade Cooling Technologymentioning

confidence: 99%

Comprehensive Review on Leading Edge Turbine Blade Cooling Technologies

Sharma¹,

Kumar²,

Singh³

et al. 2021

IJHT

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Developments in the gas turbine technology have caused widespread usage of the Turbomachines for power generation. With increase in the power demand and a drop in the availability of fuel, usage of turbines with higher efficiencies has become imperative. This is only possible with an increase in the turbine inlet temperature (TIT) of the gas. However, the higher limit of TIT is governed by the metallurgical boundary conditions set by the material used to manufacture the turbine blades. Hence, turbine blade cooling helps in drastically controlling the blade temperature of the turbine and allows a higher turbine inlet temperature. The blade could be cooled from the leading edge, from the entire surface of the blade or from the trailing edge. The various methods of blade cooling from leading edge and its comparative study were reviewed and summarized along with their advantages and disadvantages.

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Section: Advances In Gas Turbine Blade Cooling Technologymentioning

confidence: 99%

Comprehensive Review on Leading Edge Turbine Blade Cooling Technologies

Sharma¹,

Kumar²,

Singh³

et al. 2021

IJHT

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“…. Acharya and Kanani (2017) present a comprehensive review of film cooling/heating studies made since 1946. All correlations in the review are based on the group parameter x/ms, including correlations by Bunker (2006) and Colban et al (2011).…”

Section: Imentioning

confidence: 99%

A Critical Appraisal of Conventional Methodology used to Determine Heat Transfer Correlations, and Alternate Methodology

Adiutori¹

2019

GJRE

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This article describes alternate methodology for determining heat transfer correlations from experimental programs. In conventional methodology, the form of heat transfer correlations is determined before the experiment by deduction, and the experiment is performed in order to quantify constants in the deduced correlation form. In the proposed alternate methodology, the form of heat transfer correlations is determined after the experiment by induction. Three examples in the text apply the alternate methodology to data in the literature, and compare the resultant correlations to widely accepted correlations based on conventional methodology and the same data. The correlations that result from the alternate methodology agree with the underlying data much more accurately than correlations that result from conventional methodology. The difference in accuracy reflects the fact that deduction is much more difficult than induction, and therefore much more likely to include errors, and less likely to accurately describe the underlying data.

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“…100-300 • C with an internally cooled metallic base) [15][16][17]. Theories developed in this field indicate that TBCs can have additional benefits such as an increase in mean combustion temperature, reduction in heat loss to the cooling system, increase in the coefficient of thermal efficiency of the engine and enhancement in the fuel consumption rate [18][19][20][21][22][23][24][25]. Several techniques/methods are developed by researchers such as…”

Section: Introductionmentioning

confidence: 99%

Modelling Thermal Conductivity of Porous Thermal Barrier Coatings

2019

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Thermal conductivity of porous thermal barrier coatings was evaluated using a newly developed five-phase model. It was demonstrated that porosities distributed in coating strongly affect thermal conductivity. The decisive reason for this change in thermal conductivity can be traced back to defect morphology and its orientation, depending on the coating deposition technique and process parameters used during deposition. In this paper, the Bruggeman’s two-phase model was used as a reference, and a five-phase model was developed to evaluate the thermal conductivity of porous coatings. This approach uses microstructural details of the shape, size, orientation and volumetric fraction of defects of coatings as input parameters. The proposed model can predict thermal conductivity values better than the previous two-phase model.

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Advances in Film Cooling Heat Transfer

Cited by 51 publications

References 130 publications

Comprehensive Review on Leading Edge Turbine Blade Cooling Technologies

Comprehensive Review on Leading Edge Turbine Blade Cooling Technologies

A Critical Appraisal of Conventional Methodology used to Determine Heat Transfer Correlations, and Alternate Methodology

Modelling Thermal Conductivity of Porous Thermal Barrier Coatings

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