High-modulus plating for airfoil trailing edge stiffening
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Turbine engine airfoils face challenges in achieving thin trailing edges due to manufacturing constraints and stiffness requirements, leading to thicker edges with current lightweight materials that have low elastic modulus, which increases drag and susceptibility to fatigue-induced cracking.
Innovation Solution
The use of high-modulus plating, such as nickel, iron, or cobalt alloys, applied to the trailing edge of airfoils formed from lower-modulus materials like aluminum or titanium, allowing for thinner edges while maintaining necessary stiffness and resistance to flutter and fatigue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the trailing edge is made thinner to reduce drag, then aerodynamic performance is improved, but stiffness and resistance to fatigue-induced cracking deteriorate
Solution Approach 1:
The patent applies a high-modulus plating layer (such as nickel, iron, cobalt, or their alloys) onto the trailing edge of an airfoil made from lightweight materials (aluminum, titanium, or composite materials). This creates a composite structure where the high-modulus plating provides the necessary stiffness and fatigue resistance, while the underlying lightweight material maintains low weight. The composite construction allows the trailing edge to be made thinner than would be possible with conventional single-material construction, thereby reducing drag while maintaining structural integrity.
2Weight of moving object
If lightweight materials with low elastic modulus are used, then weight is reduced, but trailing edge thickness must be increased to maintain stiffness
Solution Approach 1:
The patent applies the high-modulus plating specifically to the trailing edge region where stiffness is most critical, rather than making the entire airfoil structure thicker or using high-modulus material throughout. This localized application of high-modulus material provides the necessary structural reinforcement exactly where needed, allowing the rest of the airfoil to remain lightweight while the trailing edge achieves the required stiffness-to-thickness ratio.
3Strength
If high-modulus plating is applied to the trailing edge, then stiffness and fatigue resistance are improved, but manufacturing complexity increases
Solution Approach 1:
The high-modulus plating serves as an intermediary layer that bridges the lightweight base material and the structural requirements for stiffness and fatigue resistance. Rather than requiring complex internal reinforcement structures or monolithic high-modulus components, the plating acts as a relatively simple surface treatment that can be applied through established coating techniques, thereby adding the necessary structural properties with minimal increase in manufacturing complexity.
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 the formation of thinner trailing edges with improved stiffness and reduced drag, enhancing aerodynamic performance and fatigue life of airfoils.
Implementation Method 1
The high-modulus plating may be applied to the back surface of the body portion by a method selected from the group consisting of electrolytic plating, electroless plating, brush plating, spray metal deposition, chemical vapor deposition, plasma vapor deposition, and a powder spray deposition process.
Implementation Method 2
The high-modulus plating may be applied to the back surface of the body portion by a method selected from the group consisting of electrolytic plating, electroless plating, brush plating, spray metal deposition, chemical vapor deposition, plasma vapor deposition, and a powder spray deposition process.
Implementation Method 3
The high-modulus plating may be applied to the back surface of the body portion by a method selected from the group consisting of electrolytic plating, electroless plating, brush plating, spray metal deposition, chemical vapor deposition, plasma vapor deposition, and a powder spray deposition process.
Implementation Method 4
The high-modulus plating may be applied to the back surface of the body portion by a method selected from the group consisting of electrolytic plating, electroless plating, brush plating, spray metal deposition, chemical vapor deposition, plasma vapor deposition, and a powder spray deposition process.
Implementation Method 5
The high-modulus plating may be applied to the back surface of the body portion by a method selected from the group consisting of electrolytic plating, electroless plating, brush plating, spray metal deposition, chemical vapor deposition, plasma vapor deposition, and a powder spray deposition process.
Data Source
AI summary
An airfoil is disclosed. The airfoil may comprise a leading edge, a body portion and a trailing edge formed from a high-modulus plating. The body portion of the airfoil may be formed from a material having a lower elastic modulus than the high-modulus plating. The high-modulus plating may improve the stiffness of the trailing edge, allowing for thinner trailing edges with improved fatigue life to be formed.