Propeller Blade De-icing via Segmented Radial Heating
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Solution Overview
Problem
Conventional propeller de-icing techniques struggle with maintaining rotational balance and efficiency, especially when dealing with propellers having a prime number of blades, as they cannot selectively supply de-icing current in a balanced manner, leading to ice accumulation and inefficiencies.
Innovation Solution
The solution involves a propeller assembly with blade elements divided into radially positioned portions, each equipped with heating elements that can be selectively heated in a monotonically outward sequence, allowing for simultaneous de-icing of all blades while maintaining rotational balance and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If sequential current supply is used to reduce power consumption, then power requirements are reduced, but rotational balance is compromised especially with prime number blades
Solution Approach 1:
The propeller blades are segmented into multiple radial portions (root portion, intermediate portion, tip portion), and heating elements are segmented accordingly. This allows selective activation of specific blade portions rather than heating entire blades, enabling power reduction while maintaining balance through strategic segment selection.
Solution Approach 2:
Different radial portions of blades receive different heating treatments. The system applies heat locally to specific blade portions based on ice accumulation patterns and aerodynamic requirements, rather than uniformly heating all blades. This local quality approach allows power optimization while maintaining rotational balance through differentiated heating strategies.
2Reliability
If heating elements are installed along entire radial length of blades, then de-icing coverage is maximized, but power consumption increases
Solution Approach 1:
Instead of heating the entire radial length of all blades continuously, the system applies partial heating action to specific blade portions (root, intermediate, or tip portions) based on actual ice accumulation needs. This partial action approach maintains adequate de-icing coverage while significantly reducing power consumption by avoiding unnecessary heating in ice-free regions.
Solution Approach 2:
The heating system is divided into multiple independent heating element arrays corresponding to different radial portions of blades. Each array can be independently controlled and activated only when needed, rather than operating as a single continuous system. This segmentation enables selective power application to maintain de-icing effectiveness while minimizing overall power consumption.
3Stability of the object's composition
If de-icing current is supplied to all blades simultaneously, then rotational balance is maintained, but power consumption increases significantly
Solution Approach 1:
The blade population is segmented into different groups based on radial portion (root, intermediate, tip), and heating is applied sequentially to these segments rather than simultaneously to all blades. This temporal segmentation of what would otherwise be a spatially simultaneous operation allows power consumption reduction while maintaining rotational balance through controlled sequencing.
Solution Approach 2:
The system employs periodic action by cycling through different blade portions in sequences rather than continuous simultaneous heating. Different radial portions are heated in periodic cycles, allowing each portion to receive adequate attention over time while reducing peak power demands and total energy consumption compared to continuous full-blade heating.
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 approach enables efficient de-icing of propellers with any number of blades, including prime numbers, by varying the de-icing heat along the radial length and maintaining rotational balance, thus reducing ice accumulation and power requirements.
Implementation Method 1
Conventional propeller de-icing techniques involve installing electrical heating elements or heating pipework along the leading edge of each propeller blade
Data Source
AI summary
A propeller assembly comprises two or more blade elements each comprising two or more blade element portions arranged sequentially radially along the blade element. Each of the two or more blade element portions that are radially equi-positioned along corresponding ones of the two or more blade elements together form a blade element portion array.Each of the two or more blade element portions comprise at least one heating element with each one of the at least one heating elements that is located in a correspondingly radially positioned blade element portion being connected to one another to form a heating element array.The two or more heating element arrays are adapted to sequentially heat respective ones of the two or more blade element portion arrays so as to de-ice the blade elements.