Study of wave number effect in wavy plate for improving the film cooling effectiveness at spanwise direction

Kebir, Farouk; Azzi, Abbès

doi:10.1080/10407782.2018.1444870

Cited by 5 publications

(3 citation statements)

References 25 publications

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“…All these analyses have been carried out on a simple flat plate at M=0.5. Reviewing the article kebir et al [29]will give and showing you all details about represents the graph of lateral averaged cooling effectiveness vs. x/d for three grid sizes.All grids are generated by use of the ICEM grid generation tool from ANSYS, Inc. Comparison of centerline effectiveness for classical hole case and modified hole for tow blowing ratios M = 0.5 and M=1.0 are shown in Figures 3 and 4 respectively.…”

Section: Validation and Comparison With Experimentsmentioning

confidence: 99%

“…Simulation has revealed the difference of injection angles ranging from 35°,45°,55°,65° and 90° with different blowing, where the low blowing ratios are represented by M = 0.5, and the high blowing ratios by M = 1.0 and 1.5. Kebir et al [29] Have been proposed and study new design on flat plate wavy plate, this geometry allows to give good values for effectiveness…”

Section: Introductionmentioning

confidence: 99%

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Computational Analysis on Gas Turbine Blade by Hole Modified for Optimization the Effectiveness

Kebir

2020

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In order to reduce the operating costs of the engine, turbine designers must also increase the life of their components. However, high gas temperatures throughout the engine require more cooling air or better cooling efficiency to protect the parts from thermal damage. This study presents numerical research on cooling holes. Research focused on aerodynamics and thermal aspects of shallow whole angle. The numerical simulation is performed based on Reynolds Averaged Navier-Stokes (RANS) equations with SST turbulence model by using CFX. A modification has been done in the normal injection hole of 35°, by injecting the cold fluid at different blowing ratio, providing a significant change in the shape of holes which later we found in our numerical investigation giving good quality of film cooling effectiveness.

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Section: Validation and Comparison With Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Computational Analysis on Gas Turbine Blade by Hole Modified for Optimization the Effectiveness

Kebir

2020

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“…Kebir and Khorsi [8 and 9] studies ensure that the cooling efficiency strongly depends on the blowing ratio and the injection angle. Ben Ali Kouchih et al [10] tested backward injection hole with Barchan-dune shaped shells in improving film cooling performance.…”

Section: Introductionmentioning

confidence: 99%

Blowing Ratio Effect on Film Cooling Performance for a Row Holes Installed in Different Trench Configurations

Boualem

Azzi

2020

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In the present study, a numerical analysis was performed to evaluate the performance of cooling hole embedded in different trenched designs (triangular trench, semi-cylindrical trench and corrugated trench) in improving the film cooling efficiency over a flat plate. These concepts are compared to the rectangular trenched and the traditional cylindrical hole. The commercial software ANSYS CFX 18 was used to conduct a series of required numerical calculations. The centerline and laterally averaged film cooling effectiveness and total pressure loss coefficient for the five cases are analyzed at three blowing ratios, M=0.5, M=1.0 and M=1.5. Results show a uniform coverage is obtained by hole installed in trench. The main result obtained in this paper that the cooling hole with corrugated trench enhance the film cooling effectiveness with less total pressure loss. The main result of this study reveals that the jet installed in the trenches yield a better film cooling effectiveness especially at higher blowing ratios (M≥1).

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Numerical study of heat transfer, flow fields, turbulent length scales, and anisotropy in corrugated heat exchanger channels

et al. 2022

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In this study, we report on large eddy simulation (LES) of convectively dominated heat transfer in a corrugated heat exchanger channel using the computational fluid dynamics toolbox, OpenFOAM. A chevron pattern domain with 63 contact points is used to represent the conditions in a real plate heat exchanger (PHE). The unsteady nature of the flow is elucidated using visualization techniques based on volume rendering of temperature and iso surfaces of vorticity defined using the λ2-criterion and contours of wall shear stress and wall heat flux to illustrate the heat transfer process. Global surface averaged temperature and pressure drop are extracted from the LES on successively finer grids, approaching direct numerical simulation resolution, to increase the understanding of grid resolution requirements for LES in PHEs. Industry standard Reynolds-averaged Navier–Stokes simulations are compared to the LES results along selected profiles to demonstrate similarities and differences between the two techniques. The differences detected are further investigated using anisotropy invariant mapping, energy spectra, and turbulence length scale distributions. Significant differences between the model classes are detected and detailed. Moreover, the LES resolution requirements for the flow and the heat transfer processes are found to be different with the latter being more severe.

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Study of wave number effect in wavy plate for improving the film cooling effectiveness at spanwise direction

Cited by 5 publications

References 25 publications

Computational Analysis on Gas Turbine Blade by Hole Modified for Optimization the Effectiveness

Computational Analysis on Gas Turbine Blade by Hole Modified for Optimization the Effectiveness

Blowing Ratio Effect on Film Cooling Performance for a Row Holes Installed in Different Trench Configurations

Numerical study of heat transfer, flow fields, turbulent length scales, and anisotropy in corrugated heat exchanger channels

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