Gas Turbine Combustor Liner Integral Chute Cooling
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Solution Overview
Problem
Conventional chute cooling systems in gas turbine engines are inadequate for long chutes or those with side-scarfing, as they fail to effectively manage extreme temperatures, leading to oxidation and material loss.
Innovation Solution
A combustion liner assembly with integral chutes and cooling channels formed using additive layer manufacturing (ALM), where the cooling channels extend along the chute body, enhancing cooling efficiency by directing cooling fluid to contact the chute surface effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional chute cooling systems are used, then the structure is simple, but the cooling effectiveness is insufficient for long chutes or chutes with side-scarfing
Solution Approach 1:
The cooling channels are integrated directly into the chute structure, merging the cooling system with the chute itself. This eliminates separate cooling components and achieves effective cooling for long chutes and side-scarfing configurations through the integrated design.
Solution Approach 2:
The cooling channels extend along the length of the chute in the longitudinal dimension, providing distributed cooling throughout the chute structure. This dimensional extension of cooling coverage addresses the insufficiency of conventional point-based cooling systems.
2Reliability
If conventional cooling channels are used, then the manufacturing process is simple, but the cooling fluid cannot contact the chute surface effectively
Solution Approach 1:
The cooling channels are positioned and dimensioned to provide optimal cooling fluid contact with specific critical areas of the chute surface, particularly for long chutes and side-scarfing regions. This localized cooling approach maximizes cooling efficiency where it is most needed.
Solution Approach 2:
The cooling channels are pre-formed during the molding process, ensuring proper positioning and contact geometry before the chute is assembled or installed. This preliminary formation of cooling pathways ensures effective cooling fluid contact without requiring post-manufacturing adjustments.
3Productivity
If chutes are made longer to improve airflow mixing, then the combustion efficiency improves, but the temperature exposure and material loss increase
Solution Approach 1:
The cooling channels extend continuously along the entire length of the chute, providing uninterrupted cooling action throughout the chute. This continuous cooling prevents material loss while allowing the chute to maintain its extended length for improved airflow mixing and combustion efficiency.
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
The solution effectively manages high temperatures by ensuring efficient cooling of chutes, reducing oxidation and material loss, and improving combustion efficiency by directing airflow effectively within the combustor.
Implementation Method 1
cooling channels that extend along the chute body, enhancing cooling efficiency by directing cooling fluid to contact the chute surface effectively
Implementation Method 2
cooling channels that extend along the chute body, enhancing cooling efficiency by directing cooling fluid to contact the chute surface effectively
Data Source
AI summary
Systems and methods are provided for a combustion liner assembly comprising at least a portion of a combustion liner of a combustor, the combustion liner defining a combustion chamber. A chute integral with at least the portion of the combustion liner is provided, the chute having an inlet, an outlet, and a body extending between the inlet and the outlet. The body of the chute extends towards a midline of the combustion chamber. The inlet is located in an outer surface of the combustion liner, and the outlet opens into the combustion chamber. A cooling channel is provided that extends from the outer surface of the combustion liner along the body of the chute.