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Arabian Journal for Science and Engineering

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16.02.2023 | Research Article-Mechanical Engineering

Effect of Ribs Configurations on Heat Transfer Enhancement for W-Shaped Ribs in a Square Duct

verfasst von: Sameer Sheshrao Gajghate, Onkar Prakash Deshpande, Amit Uttam Desai, Akshay Dilip Deshmukh, Shrikant Uttam Kharade, Sagnik Pal, Elaine Maria Cardoso, Bidyut Baran Saha, Swapan Bhaumik

Erschienen in: Arabian Journal for Science and Engineering | Ausgabe 9/2023

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Abstract

In this research, three W-shaped ribs are taken to analyze their influence on the heat transfer rate in the internal cooling of a gas turbine blade at constant e/D_h (0.037) and heat flux. The ribs are located on rectangular channels in a square duct, and the experiments are conducted for low Reynolds numbers (12,000–20,000). The influence of Reynolds number, pitch ratios (4.28, 5.71, and 7.14), rib shape, and rib angle (45°, 50°, and 55°) on the area-averaged heat transfer, friction factor, and thermal performance is analyzed. The experimental values of the Nusselt number and friction factor obtained from the smooth channel fit well with Dittus–Boelter and Blasius correlations. The Nusselt number increases with an increase in pitch ratio. The friction factor decreases by 3.5, 5.3, and 7.1 times for the W rib turbulator as the rib angle increases compared with the smooth channel. The present work reveals higher thermal performance than other studies based on ribs dimension, shape, pressure drop, frictional losses, and Reynolds number (12,000–20,000). Accordingly, using these geometric parameters, a new correlation of Nusselt number and friction factor is developed and compared with the experimental results. The Nusselt number and friction factor deviation were ± 6% and ± 11%, respectively.

Vorheriger Artikel Double-Diffusive Unsteady Flow in a Roof-Based Air Ventilation System with Variable Prandtl Number

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Titel: Effect of Ribs Configurations on Heat Transfer Enhancement for W-Shaped Ribs in a Square Duct
verfasst von: Sameer Sheshrao Gajghate
Onkar Prakash Deshpande
Amit Uttam Desai
Akshay Dilip Deshmukh
Shrikant Uttam Kharade
Sagnik Pal
Elaine Maria Cardoso
Bidyut Baran Saha
Swapan Bhaumik
Publikationsdatum: 16.02.2023
Verlag: Springer Berlin Heidelberg
Erschienen in: Arabian Journal for Science and Engineering / Ausgabe 9/2023
Print ISSN: 2193-567X
Elektronische ISSN: 2191-4281
DOI: https://doi.org/10.1007/s13369-023-07662-7

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