Turbomachine Blade Outer Air Seal Cooling Holes
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Solution Overview
Problem
Conventional blade outer air seals (BOAS) in turbomachines face challenges in effectively regulating temperature due to exposure to extreme heat, necessitating improved cooling configurations.
Innovation Solution
The implementation of BOAS with cooling holes defined using specific Cartesian coordinates, which are strategically positioned with respect to the center of arcs and machined surfaces, providing enhanced cooling by optimizing the placement and geometry of these holes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional BOAS without cooling holes are used, then the structure is simple, but the temperature regulation capability is insufficient under extreme heat exposure
Solution Approach 1:
The BOAS incorporates a plurality of cooling holes through its body, creating a porous structure that allows coolant flow. This enables active thermal management by permitting cooling fluid to pass through the BOAS and absorb heat, directly addressing the temperature regulation challenge while maintaining structural integrity
Solution Approach 2:
The cooling holes are configured to receive and channel coolant fluid through the BOAS body. This hydraulic approach uses fluid flow to transfer heat away from the BOAS, enabling effective temperature control in the high-temperature turbine environment
2Temperature
If cooling holes are added to BOAS for heat management, then temperature regulation improves, but manufacturing precision requirements increase
Solution Approach 1:
The cooling system is segmented into multiple discrete cooling holes distributed throughout the BOAS body. Each hole is positioned at specific locations to create effective coolant flow paths, allowing the cooling function to be distributed across multiple points rather than requiring a single complex feature
Solution Approach 2:
The cooling holes are arranged in a three-dimensional configuration within the BOAS body, with specific spacing and orientation. This spatial distribution in multiple dimensions optimizes coolant penetration and heat removal efficiency while providing manufacturing flexibility through standardized hole patterns
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
This configuration enhances cooling efficiency, leading to improved temperature regulation and performance of BOAS in turbomachines, particularly in turbine sections, by ensuring precise and effective sealing and heat management.
Implementation Method 1
a BOAS body including a plurality of cooling holes defined in substantial conformance with a set of Cartesian coordinates... the BOAS can be exposed to extreme heat and can require cooling
Data Source
AI summary
A blade outer air seal (BOAS) for a turbomachine can include a BOAS body including a plurality of cooling holes defined in substantial conformance with a set of Cartesian coordinates as set forth in Table 1 herein, wherein the Cartesian coordinates are provided with respect to a point P which is at the center of an arc W and co-planer with a machined surface V. A blade outer air seal (BOAS) for a turbomachine can include a BOAS body including a plurality of cooling holes defined in substantial conformance with a set of Cartesian coordinates as set forth in Table 2 herein, wherein the Cartesian coordinates are provided with respect to a point P′ which is at the center of an arc W′ and co-planer with a machined surface V′.