Composite Fairing Heating Architecture for Ice Protection
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Solution Overview
Problem
Existing engine inlet anti-icing systems compromise the structural integrity of aircraft components due to the use of insulating materials like Kapton, which occupy space and reduce the strength of the structure while providing ice protection.
Innovation Solution
A composite fairing with embedded heating elements and a non-overlapping configuration of heating elements and return circuits, utilizing plated through holes and busbars to conduct electric current, allowing for effective ice protection without sacrificing structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If insulating layers like Kapton are used to encapsulate heating elements, then ice protection is provided, but structural integrity is reduced
Solution Approach 1:
The patent removes the insulating layer (Kapton) that was previously used to encapsulate heating elements. By extracting this unnecessary component, the design eliminates the source of structural weakness while maintaining ice protection through the heating elements themselves, which are integrated directly into the composite fairing plies without requiring encapsulation.
Solution Approach 2:
The heating elements are merged directly with the composite fairing plies, eliminating the need for separate insulating encapsulation layers. This integration allows the heating elements to be embedded within the structural layers themselves, providing both ice protection and maintaining structural integrity simultaneously.
2Reliability
If insulating layers are used to encapsulate heating elements, then heating function is achieved, but device complexity increases
Solution Approach 1:
The patent extracts and removes the insulating encapsulation layers from the design. By taking out these unnecessary components, the structure becomes simpler while the heating function is maintained through directly integrated heating elements that require no additional encapsulation for electrical insulation.
Solution Approach 2:
The heating elements are combined with the composite fairing plies, eliminating the need for separate insulating layers. This merging reduces the number of components and simplifies the overall structure while maintaining the heating function through the integrated elements.
3Reliability
If heating elements are mounted on flexible backing and attached with adhesive, then ice protection is provided, but manufacturing precision is reduced
Solution Approach 1:
The heating elements are merged with the composite fairing plies during the manufacturing process itself, rather than being separately mounted and attached. This integration ensures precise positioning and positioning accuracy, as the heating elements become part of the ply structure during composite fabrication, eliminating the need for separate adhesive attachment steps.
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 provides comprehensive ice protection for engine inlets while maintaining the structural integrity of aircraft components, ensuring efficient airflow and engine performance in adverse weather conditions.
Implementation Method 1
at least one heating element configured to heat a first zone of the fairing, a second heating element configured to heat a second zone of the fairing
Implementation Method 2
a plated through hole extending through all fairing plies, pluralities of junctions and junction busbars for conducting electric current to the first heating element and to the plated through hole
Implementation Method 3
at least one busbar for conducting electric current from the plated through holes to the second heating element
Data Source
AI summary
A composite fairing with embedded heating architecture for ice protection includes heating elements arranged on various fairing plies for heating substantially all of the composite fairing. The heating elements are positioned to provide ice protection to substantial portions of the external surface of the composite fairing. Junctions, busbars, and plated through holes are used for delivering electric current to the heating elements on the various fairing plies.