Gas Turbine Platform Cooling Circuit Design

The cooling circuit is segmented into multiple functional zones including impingement pockets for high-velocity cooling, serpentine channels for extended heat transfer paths, and turbulator ribs for enhanced mixing. This segmentation allows each zone to perform its specific cooling function optimally, significantly improving overall cooling efficiency despite increased structural complexity

Serpentine cooling channels with curved paths are implemented instead of straight channels. The curved geometry increases the heat transfer surface area within the platform volume and promotes secondary flows that enhance convective heat transfer, thereby improving cooling efficiency while accepting greater circuit complexity

Serpentine channels with S-shaped curves are used to maintain cooling capacity along the entire channel length. The curved geometry creates secondary flows and prevents boundary layer stagnation, ensuring consistent heat transfer performance from the leading edge to the trailing edge of the platform, though it complicates the channel geometry

Turbulator ribs are inserted into the cooling channels to generate turbulence and prevent laminar flow stagnation. These ribs create controlled flow disturbances that enhance mixing between the cooling air and hot platform walls, maintaining cooling capacity along the channel length despite the added geometric complexity

The impingement cooling system is merged with the platform structure itself. Impingement pockets are formed as integral cavities within the platform, and cooling air is directed through these pockets to impinge directly on the hot surfaces. This integration enhances heat transfer efficiency while minimizing the addition of separate external components

The cooling circuit serves multiple functions: impingement cooling for high-heat-flux areas, serpentine channels for extended heat transfer paths, and turbulator ribs for flow enhancement. This multi-functionality allows a single integrated system to address various thermal challenges, improving heat transfer efficiency without requiring multiple separate cooling systems

Turbulator ribs are strategically placed to generate turbulence that enhances heat transfer. The turbulence increases mixing between the cooling air and hot surfaces, improving heat transfer performance without requiring excessively long channels, thereby limiting the pressure drop increase

Serpentine channels with optimized curvature radii are designed to extend the heat transfer path while managing pressure drop. The curved geometry promotes secondary flows that enhance heat transfer, and the channel dimensions are optimized to balance path length with acceptable pressure loss