Turbine Blade Tip Cooling Structure for Uniform Air Distribution
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Solution Overview
Problem
Existing turbine blade tips face challenges in efficiently distributing cooling air to maintain effective thermal management under high temperature stress.
Innovation Solution
A turbine blade tip design featuring a circumferential wall with recesses and strategically positioned cooling air holes, supplemented by an inlet housing and internal air channels, facilitates uniform cooling air distribution through a single duct to multiple outlets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple cooling air holes are provided in the wall to improve cooling coverage, then cooling effectiveness is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The single cooling air duct is segmented into multiple outlet channels through internal partition walls, allowing cooling air to be distributed to multiple locations through one duct structure. This maintains cooling effectiveness while avoiding the complexity of multiple separate ducts
Solution Approach 2:
Multiple cooling channels are nested within the single cooling air duct structure. The partition walls create internal channels that branch off from the main duct, enabling one duct to serve multiple cooling locations without increasing external complexity
2Reliability
If multiple cooling air ducts are provided to supply cooling air to multiple holes, then cooling distribution is improved, but manufacturing precision requirements increase
Solution Approach 1:
Multiple cooling air ducts are merged into a single integrated duct structure with internal partition walls. This combining approach maintains the ability to supply multiple cooling locations while reducing the number of separate components that require precise positioning and alignment
Solution Approach 2:
The single duct is segmented internally into multiple channels using partition walls, allowing one duct to perform the function of multiple ducts. This segmentation occurs within a single manufactured component, eliminating the need for precise assembly of multiple separate ducts
3Device complexity
If a single cooling air duct supplies air to multiple cooling holes, then device complexity is reduced, but cooling distribution uniformity may deteriorate
Solution Approach 1:
The single cooling air duct is segmented into multiple internal channels by partition walls, creating separate flow paths that can be independently optimized. This maintains structural simplicity while enabling uniform cooling distribution through controlled air flow to each outlet location
Solution Approach 2:
Each internal channel within the single duct can be designed with specific dimensions and orientations tailored to the local cooling requirements at each outlet location. This allows optimized cooling distribution while maintaining the simplicity of a single integrated duct structure
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
Enhances cooling efficiency by ensuring uniform air distribution, thereby improving thermal resistance and extending the blade's operational lifespan.
Implementation Method 1
a channel is provided in the wall, wherein the channel within the wall can be supplied with cooling air via at least one air supply channel of the turbine blade, wherein several cooling air holes are provided which are arranged in the wall and are fluidically connected to the channel and allow the cooling air to flow out of the radial end of the wall
Implementation Method 2
Turbine blades of gas turbines or turbines that are subject to high temperature stress have cooling structures inside and, if necessary, cooling holes on the outer wall of the blade, from which cooling air flows out from the inside of the turbine blade
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
Improved cooling is made possible by an improved cooling structure with cooling air holes (18) inside a depression (20) in a blade tip (3) and a special arrangement of multiple cooling air holes (25) which are supplied by a single cooling air channel (40) inside a wall (19).