Hybrid Acoustic Induction Heating for Airfoil Ice Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Induction heating systems for preventing ice formation on aircraft control surfaces are energy-intensive, and acoustic methods for de-icing face inefficiencies due to complex coupling requirements with ice-covered surfaces.
Innovation Solution
A hybrid acoustic induction-heating system for airfoils, comprising a magnetically and electrically conductive skin with an induction coil and magnet, generating eddy currents and acoustic pressure to prevent ice formation, using a control system to adjust heat and pressure based on ambient temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If induction heating is used to prevent ice formation on aircraft control surfaces, then ice prevention effectiveness is improved, but energy consumption increases
Solution Approach 1:
The patent combines induction heating and acoustic de-icing into a hybrid system. The induction heating element provides thermal energy to prevent ice formation, while the acoustic transducer delivers vibrational energy to disrupt ice accumulation. This merging of two different physical mechanisms (thermal and mechanical) allows the system to achieve reliable ice prevention while potentially reducing the energy required by each individual component compared to using either method alone at full capacity.
Solution Approach 2:
The acoustic transducer operates by delivering periodic vibrational pulses to the airfoil surface. This periodic mechanical action disrupts the formation and accumulation of ice in cycles, working in conjunction with the continuous or intermittent induction heating. The periodic nature of the acoustic input allows for energy-efficient operation by applying mechanical disruption only when needed during the ice formation process, rather than continuous operation.
2Reliability
If acoustic methods are used for de-icing, then ice removal capability is improved, but system complexity increases due to coupling requirements
Solution Approach 1:
The patent positions the acoustic transducer as an intermediary element that couples the de-icing function to the airfoil surface. The transducer is mounted on the airfoil and directly transmits vibrational energy through the skin to the ice layer. This intermediary approach simplifies the overall system by integrating the acoustic source directly onto the airfoil structure, eliminating the need for complex external coupling mechanisms or separate delivery systems.
Solution Approach 2:
The airfoil skin serves multiple functions: it is both the aerodynamic surface and the mounting substrate for the de-icing system. The induction heating element and acoustic transducer are both integrated into the airfoil structure, allowing the skin to serve as a universal platform for both aerodynamic performance and ice protection. This multi-functionality reduces system complexity by eliminating separate structural components that would otherwise be needed to support the de-icing equipment.
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 system efficiently prevents ice formation on airfoil surfaces by combining inductive heat and acoustic vibrations, reducing energy consumption and improving de-icing efficiency compared to traditional methods.
Implementation Method 1
At least a portion of the induction coil is sufficiently close to the internal surface of the skin to produce an eddy current in the skin when an alternating electrical current is flowing in the induction coil
Implementation Method 2
produce an eddy current in the skin when an alternating electrical current is flowing in the induction coil
Implementation Method 3
hybrid acoustic induction-heating system, configured to impede formation of ice on the external surface of the skin
Implementation Method 4
At least the one magnet is configured to produce a steady-state magnetic field within the skin
Data Source
AI summary
A method of impeding formation of ice on an exterior surface of airfoil is disclosed. The method comprises detecting first ambient conditions known to cause the ice to form on exterior surface. The method also comprises supplying inductive heat and acoustic pressure to exterior surface when the first ambient conditions are detected. The method additionally comprises detecting second ambient conditions known to impede the ice from forming on exterior surface. The method further comprises discontinuing to supply the inductive heat and the acoustic pressure to exterior surface when the second ambient conditions are detected.