Gas Turbine Blade Outer Air Seal Cooling
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Solution Overview
Problem
Blade outer air seals (BOAS) in gas turbine engines face challenges in achieving adequate cooling due to exposure to extreme heat, which can lead to inefficiencies and performance issues.
Innovation Solution
The implementation of BOAS with cooling holes defined using specific sets of Cartesian coordinates, optimizing their placement to enhance cooling efficiency by normalizing measurements based on distances and radii of curvature, thereby improving heat transfer through the seals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If cooling holes are added to the BOAS body, then cooling efficiency is improved, but manufacturing precision requirements increase due to the need for specific coordinate definitions
Solution Approach 1:
The patent applies parameter changes by defining cooling hole locations using normalized Cartesian coordinates based on geometric parameters of the BOAS body (arc radius R, height H). This normalization allows the cooling hole pattern to be reproduced at different scales while maintaining optimal cooling performance, resolving the contradiction between achieving effective cooling and maintaining manufacturing precision.
2Temperature
If cooling holes are positioned to maximize cooling, then heat transfer is improved, but the structural integrity of the BOAS body may be compromised
Solution Approach 1:
The patent applies local quality by strategically positioning cooling holes in specific regions of the BOAS body based on normalized coordinates. The cooling holes are concentrated in areas where heat accumulation is most critical (near the arc surface and mid-height regions), while maintaining sufficient material between holes to preserve structural integrity. This localized approach optimizes heat transfer without compromising overall strength.
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 effectively enhances the cooling of BOAS, improving their performance by maintaining optimal temperature control and reducing heat-related inefficiencies in gas turbine engines.
Implementation Method 1
a BOAS body including a plurality of cooling holes... effectively enhances the cooling of BOAS... maintaining optimal temperature control
Implementation Method 2
improving heat transfer through the seals... improving their performance by maintaining optimal temperature control
Data Source
AI summary
A gas turbine engine includes a turbine section including a plurality of blade outer air seals (BOAS) disposed therein, the BOAS including a BOAS body including a plurality of cooling holes defined in substantial conformance with a set of Cartesian coordinates as set forth in at least one of Table 1 and Table 2.