Turbine Blade Platform Cooling Circuit With Segmented Core Ribs
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Solution Overview
Problem
Forming and utilizing platform cores within turbine engine components is challenging due to durability issues, manufacturing constraints, and mechanical stress, particularly when using clamshell molds, which limit design flexibility and core stability.
Innovation Solution
Implementing a cored platform with multiple cores separated by ribs, which enhances operational cooling and durability by providing stability and reducing mechanical stresses, allowing for improved heat transfer and stress distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If platform cores are formed within turbine engine components using clamshell molds, then manufacturing is enabled, but durability issues and mechanical stress problems occur
Solution Approach 1:
The platform core is divided into multiple segments or pieces rather than forming it as a single integrated component. This segmentation allows each piece to be manufactured separately with appropriate tolerances and then assembled, reducing the mechanical stress and durability issues that arise from attempting to form a complete core in one piece using clamshell molds.
2Temperature
If multiple platform cores are implemented for cooling, then cooling efficiency improves, but manufacturing complexity and core stability decrease
Solution Approach 1:
Multiple platform cores are implemented as separate, modular segments rather than complex integrated structures. Each core segment can be manufactured independently using simplified processes, then assembled into the final cooling assembly. This approach maintains cooling efficiency through multiple cores while reducing manufacturing complexity compared to forming multiple interconnected cores as a single piece.
3Stability of the object's composition
If platform cores are formed with tight tolerances for stability, then core stability improves, but manufacturing precision requirements increase
Solution Approach 1:
The platform core is segmented into multiple pieces that are assembled together. Each segment can be manufactured with relaxed tolerances individually, and the final stability is achieved through the assembly configuration and interlocking features rather than requiring each component to be manufactured with tight tolerances. This reduces the overall manufacturing precision requirements while maintaining core stability.
Solution Approach 2:
Joining features or intermediary elements are introduced between core segments to provide stability without requiring tight manufacturing tolerances on the core pieces themselves. These intermediaries act as mediators that compensate for tolerance variations and ensure stable assembly.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The multi-core design improves cooling efficiency and durability by allowing for tailored cooling fluid distribution and stress management, reducing thermal discrepancies and enhancing overall component performance.
Implementation Method 1
cooling is accomplished by ducting cooler air from the high and/or low pressure compressors to the engine components that require cooling
Implementation Method 2
routing the cooling air through the engine component to cool different portions of the engine component
Data Source
AI summary
A turbine blade assembly for a turbine engine that generates a hot fluid flow and provides a cooling fluid flow. The turbine blade assembly having a platform with an upper wall radially spaced from a lower wall, and a platform wall connecting the upper wall to the lower wall to bound an interior of the platform. An airfoil extending from the upper wall and having an airfoil wall at least partially bounding an interior of the airfoil and defining a heated surface in contact with the hot fluid flow. At least one cooling supply conduit extending into the interior of the airfoil and multiple cores provided in the interior of the platform.