Vortex Generator Attachment Layer for Wind Turbine Blades
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Solution Overview
Problem
Conventional methods for attaching vortex generators to wind turbine rotor blades are expensive, time-consuming, and require hazardous adhesives, making them inefficient and unsafe for field installations.
Innovation Solution
A system using a foam-based attachment layer with a lower shear modulus, such as Very High Bond (VHB) or SAFT foam tape, to connect vortex generator accessories to the rotor blade, allowing for shear slippage and eliminating the need for adhesives and fixtures, along with a template for precise placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional attachment methods using adhesives and fixtures are used, then the vortex generators can be securely attached to the rotor blade, but the installation process becomes expensive, time-consuming, and requires hazardous materials
Solution Approach 1:
The patent removes hazardous adhesives and complex attachment fixtures from the installation process, extracting only the essential attachment function. The vortex generator base portion is directly attached to the rotor blade surface using a simplified method that eliminates the need for dangerous chemicals and elaborate mounting equipment, thereby improving installation efficiency while maintaining attachment security.
Solution Approach 2:
The patent introduces a protective coating layer as an intermediary between the vortex generator base portion and the rotor blade surface. This coating serves as a mediator that provides adequate attachment while eliminating the need for hazardous adhesives. The coating layer allows for a simpler, faster installation process while still ensuring the vortex generator remains securely attached during operation.
2Reliability
If conventional attachment methods with adhesives are used, then the vortex generators can be firmly fixed to the blade, but the installation requires significant dwell time for curing and protective measures
Solution Approach 1:
The patent extracts the curing time requirement by eliminating adhesives that need extended drying periods. The new attachment method allows for immediate or near-immediate attachment of vortex generators to the rotor blade without requiring lengthy curing periods, significantly reducing installation time while maintaining firm attachment through the protective coating system.
Solution Approach 2:
The patent employs a protective coating layer that serves as a single-use, disposable attachment medium. This coating is applied to the base portion and provides sufficient attachment firmness without requiring long curing times. The coating is designed to be simple, cost-effective, and sufficient for the attachment purpose, eliminating the need for time-consuming adhesive curing processes.
3Reliability
If conventional attachment fixtures and adhesives are used, then secure mounting is achieved, but the process becomes complex and requires specialized equipment and safety precautions
Solution Approach 1:
The patent extracts and removes attachment fixtures, specialized equipment, and hazardous adhesives from the mounting process. The simplified system relies on a protective coating applied to the base portion, eliminating the need for complex attachment hardware and specialized installation equipment, thereby reducing device complexity while maintaining mounting security through the coating's adhesive properties.
Solution Approach 2:
The protective coating acts as an intermediary that simplifies the attachment system by replacing complex fixtures and hazardous adhesives. This single coating layer provides all necessary attachment functions, eliminating the need for multiple components and specialized equipment, thus reducing overall system complexity while ensuring secure mounting of the vortex generator to the rotor blade.
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
Enables easy, cost-effective, and efficient on-site mounting of vortex generators, reducing installation time and safety risks while maintaining aerodynamic performance by isolating shear stresses and allowing for flexible attachment.
Implementation Method 1
The attachment layer has a lower shear modulus than the base portion to allow for shear slippage between the base portion and the underlying suction or pressure side
Data Source
AI summary
A rotor blade assembly for a wind turbine includes a rotor blade having a pressure side, a suction side, a leading edge, and a trailing edge. A vortex generator accessory is mounted to either of the suction side or pressure side and includes a base portion and a protrusion member extending upwardly from the base portion. An attachment layer connects the base portion to the suction or pressure side. The attachment layer has a lower shear modulus than the base portion to allow for shear slippage between the base portion and the underlying suction or pressure side.