Modular Gas-Turbine Combustion Chutes for Flow Guidance
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Solution Overview
Problem
Existing gas-turbine combustion chambers face issues with flow separation and increased pressure loss due to sharp-edged and narrow radii in mixing air orifices, leading to suboptimal flow guidance and assembly complexity, along with leakage and cooling disruptions.
Innovation Solution
The design features a mixing air wall element with tube-like chutes that extend around the circumference of the combustion chamber, allowing for larger curvature radii and optimized flow areas, reducing leakage and pressure loss by integrating chutes with the combustion chamber wall and tiles, enabling easier assembly and improved airflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If chutes are fastened to tiles or designed in one piece by casting, then flow guidance is improved, but sharp-edged and narrow radii cause flow separations and increased pressure loss
Solution Approach 1:
The patent applies curvature by designing chutes with rounded edges and optimized radii instead of sharp edges. The mixing air orifices are designed with curved transition zones that eliminate flow separations, directly addressing the pressure loss problem while maintaining improved flow guidance.
Solution Approach 2:
The patent changes geometric parameters of the chutes and orifices, specifically optimizing the radii and edge profiles. By modifying these parameters from sharp-edged to rounded designs with specific radius values, the patent eliminates flow separations and reduces pressure losses while maintaining effective flow guidance.
2Productivity
If mixing air orifices are provided in combustion chamber wall, then mixing air can be introduced into combustion chamber, but space between combustion chamber wall and tiles cannot be sealed off causing leakage
Solution Approach 1:
The patent extracts the sealing function from the general assembly and creates a dedicated sealing structure. The sealing element is specifically designed to fill the gap between the combustion chamber wall and tiles, preventing leakage while allowing mixing air to be supplied through the orifices in the wall.
Solution Approach 2:
The patent introduces a sealing element as an intermediary component between the combustion chamber wall and tiles. This mediator fills the gap and prevents leakage of mixing air, while not interfering with the function of the orifices in supplying mixing air to the combustion chamber.
3Adaptability or versatility
If combustion chamber is assembled from large number of individual components, then assembly flexibility is provided, but manufacturing and assembly effort increases
Solution Approach 1:
The patent merges multiple individual components into integrated assemblies. The chutes are designed to be mounted on tiles as integrated units, and the sealing element combines sealing and structural functions. This reduces the number of separate components and assembly steps while maintaining the flexibility of modular construction.
Solution Approach 2:
The patent creates multi-functional components that perform multiple functions. The sealing element provides both sealing and structural support, the chutes provide both flow guidance and structural attachment, reducing the need for separate dedicated components and simplifying the overall assembly.
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 design enhances airflow guidance, reduces pressure losses, and improves combustion conditions by allowing smaller orifice diameters and increased air pulses, leading to better flow and temperature profiles while minimizing assembly complexity and leakage.
Implementation Method 1
the several chutes can thus be manufactured in one piece with the mixing air wall element... enables an optimized structure, ease of assembly and a good mixing airflow guidance
Implementation Method 2
These result in turn in an increased pressure loss and in a reduced flow through the mixing orifices/mixing air orifices... reduces pressure losses
Implementation Method 3
it is not possible to seal off the space between the combustion chamber wall and the tiles, so that part of the mixing air flows into the space... minimizing assembly complexity and leakage
Data Source
AI summary
The present invention relates to a gas-turbine combustion chamber with mixing air orifices, with a combustion chamber wall, with tiles arranged on the inside of the combustion chamber wall at a certain distance from said combustion chamber wall as well as with mixing air orifices passing through the combustion chamber wall and the tiles, characterized in that the mixing air orifices are formed by chutes which are designed tube-like and pass through the tiles, and that several chutes are formed on a mixing air wall element extending at least around part of the circumference of the combustion chamber.