Trailing Edge Cap for Wind Turbine Blades
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Solution Overview
Problem
Wind turbine rotor blades suffer from noise generation and reduced energy capture due to the interaction between boundary layer air and the blunt trailing edge, necessitating an improved trailing edge protective cap that also enhances annual energy production (AEP).
Innovation Solution
A method for manufacturing a trailing edge protective cap involving infusion of materials onto molds to form parts with specific configurations, including diverging legs and an extension member, which are joined to create a cap that engages the pressure and suction sides of the rotor blade, providing protection and extending the chord for increased energy capture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a thick layer of adhesive is applied to bond shell components, then the bond strength is improved, but the manufacturing complexity and time increase
Solution Approach 1:
The trailing edge cap integrates multiple functions into a single component: it provides structural bonding support, noise reduction through rounded geometry, and protective coverage. This eliminates the need for separate thick adhesive applications and multiple bonding steps, reducing manufacturing complexity while maintaining bond strength.
Solution Approach 2:
The trailing edge cap is pre-formed with integrated bonding surfaces and attachment features before installation. This preliminary preparation allows for simpler, faster assembly on the rotor blade without requiring complex现场 bonding operations, thus reducing manufacturing time and complexity.
2Ease of manufacture
If the trailing edge is left sharp and blunt, then the manufacturing is simpler, but noise generation increases due to boundary layer air interaction
Solution Approach 1:
The trailing edge cap features a rounded, curved trailing edge geometry that replaces the sharp blunt edge. This curvature smooths the airflow interaction with the trailing edge, reducing turbulence and noise generation from boundary layer air, while the cap itself can be manufactured using standard molding processes.
3Ease of manufacture
If the trailing edge is left blunt, then the manufacturing is simpler, but energy capture is reduced
Solution Approach 1:
The rounded trailing edge geometry of the cap improves aerodynamic flow characteristics at the trailing edge, reducing flow separation and enhancing the effective swept area. This curvature optimization increases energy capture efficiency while the cap remains manufacturable using conventional processes.
Data Source
AI summary
A trailing edge protective cap for a rotor blade of a wind turbine and method of manufacturing same is disclosed. The method includes infusing a first material onto a first mold so as to form a first part having a length. While the first part is still in the first mold, the method may also include placing a second mold onto the first part. The method may then include infusing a second material onto the second mold and at least a portion of the first part so as to form a second part having a length. The first and second parts may then be joined or infused together along a portion their respective lengths so as to form the protective cap, wherein the protective cap includes a joined section and an open section.