Bosses for fuel injection assemblies with cooling circuits, and combustors with bosses.
The boss design with a cooling circuit and film cooling channels addresses the issue of high-temperature exposure in gas turbine combustors, enhancing the durability of the fuel injection assembly components.
JP2026093346APending Publication Date: 2026-06-08GENERAL ELECTRIC TECH GMBH
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- GENERAL ELECTRIC TECH GMBH
- Filing Date
- 2025-11-10
- Publication Date
- 2026-06-08
AI Technical Summary
Technical Problem
Bosses in axial fuel staging systems of gas turbine combustors are exposed to high-temperature combustion gases, leading to potential damage and reduced hardware life.
Method used
A boss design with an inner and outer flange, a body, and a cooling circuit featuring a post-impingement plenum and film cooling channels to enhance cooling, including impingement and film cooling openings, is integrated into the fuel injection assembly.
Benefits of technology
The cooling circuit effectively protects the boss from high temperatures, extending its lifespan and maintaining the integrity of the fuel injection assembly components.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure 2026093346000001_ABST
Abstract
This document provides a combustor, a boss, and a method for manufacturing the boss. [Solution] The combustor includes a combustion liner defining a combustion chamber and an outer sleeve, which is spaced apart from the combustion liner such that an annular portion is defined between the combustion liner 46 and the outer sleeve. The combustor further includes a fuel injection assembly having a boss. The boss includes an inner flange coupled to the combustion liner, an outer flange, and a body extending between the outer flange and the inner flange. The boss defines a cooling circuit 318 having a post-impingement plenum defined in the inner flange between the inner wall of the inner flange and an impingement plate cooling in close proximity to the inner wall. Multiple film cooling channels are defined in the inner flange and fluidly couple the post-impingement plenum to the combustion chamber.
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