Naik, Nithesh and Ashutosh, . and Mayank, . and Utkarsh, . and Rozek, Andre (2015) Numerical Investigation of Heat Transfer Characteristics of Different Rib Shapes in a Gas Turbine Blade. International Journal of Applied Engineering Research, 10 (78). pp. 244-248. ISSN 0973-4562

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Abstract

The heat transfer and friction loss performances of a single rib-roughened rectangular cooling channel having novel rib shapes were evaluated through numerical investigation using Ansys CFX. The investigation was conducted on rectangular channel of aspect ratio (AR) = 4:1 with rib height to hydraulic diameter ratio (e/Dh) of 0.1 and rib pitch to height ratio (P/e) of 10 at Re = 30,000. The computations were performed by solving the RANS equation using k-ε turbulence model. Fluid flow simulations results of stationary case for different configuration are presented in terms of thermal performance parameters, Nusselt number. These parameters indicate that a particular configuration of nozzle ribs provides better heat transfer characteristics over the conventional 45° ribs. The numerical investigation undertaken in this study indicates an increase in overall efficiency of gas turbine due to increased thermal performance parameter, heat transfer co-efficient and less pumping pressure.

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