Gas Turbine Nose Cone Access Panel Design
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Solution Overview
Problem
Existing nosecone assemblies for gas turbine engines face challenges in promoting aerodynamic airflow while preventing water and debris ingress, and require efficient assembly and maintenance access.
Innovation Solution
A nosecone assembly design featuring a nosecone body with a wall defining an interior cavity and at least one window aperture, along with an access panel that is elastomeric and attached to the wall with a 'U' or 'V' shaped attachment region, allowing for easy tool insertion and reduced assembly resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the access panel is fully attached to the wall interior surface, then structural integrity is improved, but tool insertion and maintenance access become difficult
Solution Approach 1:
The attachment region is divided into multiple discrete attachment points rather than a continuous attachment, creating segments that allow controlled deformation. This segmentation enables the access panel to maintain overall structural integrity while providing localized flexibility for tool insertion through the window aperture.
2Ease of operation
If the access panel is made flexible to allow tool insertion, then ease of operation is improved, but stress on attachment regions increases
Solution Approach 1:
The access panel exhibits different mechanical properties at different locations: the attachment regions are designed to be relatively rigid to maintain structural integrity, while the central region (particularly near the window aperture) is designed to be more flexible to allow tool insertion. This local differentiation of mechanical properties resolves the contradiction between flexibility for operation and stress resistance.
3Ease of repair
If the nosecone body is designed with multiple access panels for maintenance, then ease of repair is improved, but device complexity increases
Solution Approach 1:
Multiple access panels are integrated into the nosecone body structure, each serving dual purposes: maintaining aerodynamic flow and providing maintenance access. The attachment region design with multiple attachment points serves both structural and functional requirements, reducing the need for separate components and thereby managing complexity while improving repairability.
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 design enhances aerodynamic airflow, facilitates easy assembly and maintenance by providing feedback to operators through reduced tool insertion force, and maintains durability by minimizing stress on attachment regions.
Implementation Method 1
The access panel may include an elastomeric access panel configured to deform, upon receipt of an installation force, to a deformed state that provides feedback to an operator that the access panel has been properly installed
Data Source
AI summary
A nosecone assembly having an axially extending centerline is provided. The assembly includes a nosecone body and at least one access panel. The nosecone body has at least one wall that defines an interior cavity. The wall has an interior surface contiguous with the interior cavity, and at least one window aperture extending through the wall. The access panel has first and second face surfaces. The access panel is attached to the wall interior surface within an attachment region that includes first and second attachment region portions partially contiguous with one another. The first and second attachment region portions define an interior unattached region, and the interior unattached region is aligned with the window aperture.