Impingement Sleeve Aperture Geometry for Turbine Cooling
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Solution Overview
Problem
Existing impingement cooling systems in turbine systems face challenges in controlling cooling fluid flow, particularly in the presence of cross-flow, leading to inefficiencies and increased compressed air usage, which decreases turbine efficiency and increases operating costs.
Innovation Solution
The impingement sleeve features non-round apertures and conduits with varying geometries and orientations to control and concentrate fluid flow, ensuring efficient cooling of hard-to-reach areas and hot spots within a turbine nozzle, while reducing the amount of cooling fluid required.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an increased amount of cooling fluid is passed through the apertures in the impingement member, then sufficient cooling of the component is ensured, but an increased portion of compressed air is removed prior to reaching the combustor, which decreases efficiency and increases operating cost
Solution Approach 1:
The impingement member features apertures with different geometries (round, oval, slot-shaped) distributed across its surface, with each aperture type strategically positioned to address specific local cooling requirements. The aperture geometries vary in orientation and shape to optimize cooling fluid distribution to different regions of the turbine component, ensuring effective cooling of hot spots and hard-to-reach areas while minimizing overall compressed air consumption.
2Reliability
If cooling fluid flow is increased to cool hard-to-reach areas, then sufficient cooling is achieved, but the amount of compressed air required increases, decreasing turbine efficiency
Solution Approach 1:
The impingement member is segmented into multiple aperture regions with different aperture types (round apertures, oval apertures, slot-shaped apertures) positioned to target specific zones of the turbine component. This segmentation allows cooling fluid to be distributed to different areas with appropriate flow characteristics, ensuring hard-to-reach regions receive adequate cooling without requiring a uniform increase in total compressed air flow through all apertures.
3Ease of manufacture
If conventional round apertures are used in the impingement member, then manufacturing is simple, but control of cooling fluid flow is difficult, particularly in the presence of cross-flow
Solution Approach 1:
The impingement member incorporates non-round aperture geometries including oval apertures and slot-shaped apertures with specific aspect ratios and orientations. These asymmetric geometries are designed to control the direction and distribution of cooling fluid flow, reducing the influence of cross-flow effects and improving flow control to specific target areas on the turbine component, while still being manufacturable using standard fabrication processes.
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 solution enhances cooling efficiency, decreases fluid usage, and allows for higher operating temperatures by precisely directing cooling fluid flow, thereby improving turbine performance and reducing operational costs.
Implementation Method 1
The impingement member directs cooling fluid through the apertures and towards a surface that is intended to be cooled
Implementation Method 2
directs cooling fluid through the apertures and towards a surface that is intended to be cooled
Data Source
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AI summary
An article (100) and method of forming an article (100) are provided. The article (100) includes a body portion (201) separating an inner region (203) and an outer region (205), an aperture (101) in the body portion (201), the aperture (101) fluidly connecting the inner region (203) to the outer region (205), and a conduit (103) extending from an outer surface (206) of the body portion (201) at the aperture (101) and being arranged and disposed to controllably direct fluid from the inner region (203) to the outer region (205). The method includes providing a body portion (201) separating an inner region (203) and an outer region (205), providing an aperture (101) in the body portion (201), and forming a conduit (103) over the aperture (101), the conduit (103) extending from an outer surface (206) of the body portion (201) and being arranged and disposed to controllably direct fluid from the inner region (203) to the outer region (205). The article (100) is arranged and disposed for insertion within a hot gas path component (400).