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HomeDiffusion FoundationsDiffusion Foundations Vol. 16Numerical Approach at Flat Plate for Predicting...

Numerical Approach at Flat Plate for Predicting the Film Cooling Effectiveness Part B: Effect Injection Angle

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Abstract:

In order to improve the cooling effectiveness of the film, a numerical study was conducted to study the effects of different film-cooled angles on surface heat transfer. In this work CFD 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. And the turbulence closure is done with the help of the k - ω shear stress transport (SST) turbulence model. It is found that the stream-wise variations in the angles of the holes do not really provide a significant change in the adiabatic film cooling effectiveness results. On the other hand, the results indicate that the hole of angles 35°and 45° improved the centerline and laterally averaged adiabatic effectiveness, and the effectiveness decrease particularly at high blowing ratios.

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Diffusion Foundations Vol. 16

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Periodical:

Diffusion Foundations (Volume 16)

Pages:

57-71

DOI:

https://doi.org/10.4028/www.scientific.net/DF.16.57

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Online since:

June 2018

Authors:

Farouk Kebir*, Azzeddine Khorsi

Keywords:

Blowing Ration, CFD, Effectiveness Film Cooling, Film Cooling, Gas Turbine, Injection Angle, Turbine Blade

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© 2018 Trans Tech Publications Ltd. All Rights Reserved

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