Aircraft Leading-Edge Structure with Closed-Chamber Air Heating
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing aircraft wing de-icing and anti-icing systems, such as those using bleed air or integrated heater mats, are complex, costly, and difficult to maintain, with potential for increased installation effort and complex monitoring requirements.
Innovation Solution
A separate heating device is integrated inside the leading-edge structure, combined with an air conveying system to create a circulating flow of heated air within a closed chamber, which heats the inner surface of the leading-edge panel, allowing for simple installation and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bleed air is supplied through piccolo tubes to heat the slat leading edge, then anti-icing function is achieved, but device complexity increases due to complex moveable interfaces and multiple bleed air tubes
Solution Approach 1:
The heating system is segmented into independent heating elements distributed along the leading edge, each with its own air inlet and heating zone. This segmentation eliminates the need for complex moveable interfaces by allowing each segment to operate independently, reducing overall system complexity while maintaining anti-icing reliability
Solution Approach 2:
The heating elements are extracted from the slat body structure and positioned as separate components in the leading edge region. This extraction simplifies the moveable interface requirements by separating the heating function from the slat mechanism, allowing the heating system to operate independently of slat movement
2Reliability
If multiple bleed air tubes are connected between consecutive slat bodies, then heating coverage is improved, but installation effort increases
Solution Approach 1:
Multiple heating elements are merged into a coordinated system where air inlet channels and heating zones are integrated along the leading edge. This merging reduces installation effort by creating a modular assembly that can be installed as a unit rather than connecting multiple separate tubes between slat bodies
Solution Approach 2:
The heating system is designed with universal mounting provisions that allow the same heating element design to be used across multiple slat bodies. This multi-functionality reduces installation effort by eliminating the need for custom tube connections for each slat, as the same modular heating unit can be replicated throughout
3Reliability
If bleed air system with pressure and temperature monitoring is used, then heating control is improved, but device complexity and monitoring effort increase
Solution Approach 1:
The heating elements are designed to self-regulate based on ambient conditions and air flow characteristics. The system utilizes natural convection and thermal feedback to maintain appropriate heating levels without requiring complex external monitoring and control systems, thereby reducing device complexity while preserving heating control effectiveness
4Reliability
If electrical heating mat is integrated into composite material of slat cover, then heating efficiency is improved, but manufacturing complexity increases and repair becomes difficult
Solution Approach 1:
The heating system is segmented into discrete, replaceable heating elements rather than a single integrated mat. This segmentation allows for simpler manufacturing of individual components and enables easy replacement of failed elements without requiring complex repair processes or replacement of the entire slat cover
Solution Approach 2:
The heating elements are extracted from the composite slat cover structure and positioned as separate, accessible components. This extraction simplifies manufacturing by allowing the heating elements to be produced and tested independently before installation, and it greatly facilitates repair by enabling direct replacement of failed heating elements without damaging the composite structure
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 solution reduces complexity, manufacturing costs, and improves maintainability while ensuring reliable de-icing or anti-icing functionality, even in case of device malfunctions, by using independent heating devices and air conveying systems.
Implementation Method 1
The fan and the heating device each essentially comprise an enclosure (23, 25) in the form of a tube section
Implementation Method 2
an air conveying device (24) in fluid communication with the heating device, wherein the air conveying device is configured to convey air from inside the chamber through the heating device to be heated and returned to the chamber
Data Source
Figure 1~2
Figure 3~5
AI summary
A heated leading-edge structure (2) for an aircraft is proposed, comprising a leading edge panel (4) having an outer surface (6) configured to be contacted by an ambient flow, and an inner surface (8) opposite the outer surface (6), a rear panel (10) arranged at least partially arranged in a distance to the inner surface (8), a closed chamber (20) inside the leading-edge structure (2), a heating device (22) attached inside the chamber (20), and an air conveying device (24) in fluid communication with the heating device (22), wherein the air conveying device (24) is configured to convey air from inside the chamber (20) through the heating device (22) to be heated and returned to the chamber (20), such that a circulating flow of heated air is created inside the chamber (20).