Flow and Heat Transfer Characteristics of Ribbed Turbine Blade Cooling Channel: A Review

Mechanical Engineering

The main objective of the study is to obtain high overall cooling performance with lowest possible penalty on thermodynamic performance cycle. The periodic ribs are frequently employed in various ducts to enhance the heat transfer process for many applications including gas turbine cooling systems. These arrangements of ribs and deflectors have important influence on the thermal and hydraulic performances of these cooling ducts. It is essential to understand the flow physics and to improve the current internal cooling design. Many techniques have been developed to enhance the heat transfer in these passages. The cooling passage located in the middle of the airfoil is often used with rib turbulator while pin fins and dimples can be used in the trailing edge portion of the vanes and blades.

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