Wind Turbine Rotor Blade Element for Efficiency and Noise Reduction
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Solution Overview
Problem
Existing wind turbine rotor blades face inefficiencies and noise issues during operation, with existing solutions either being complex to implement or not effectively addressing both efficiency and noise reduction simultaneously.
Innovation Solution
A rotor blade element with a trailing edge flange and adaptive curvature, made from lightweight materials like plastic or composite structures, which can be easily mounted to existing blades using double-sided adhesive tape, extending the chord length and reducing noise by elastically deforming to match airflow dynamics, and optionally featuring a serrated edge or winglet for enhanced safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a blade element is mounted to change the airfoil profile to a blunt trailing edge profile, then the efficiency is improved, but the device complexity increases
Solution Approach 1:
The blade element is divided into separate functional components: a blade element body, a trailing edge flange for mounting, and optional additional elements like serrations or winglets. This segmentation allows each component to be optimized independently and simplifies the overall implementation while maintaining the efficiency benefits of the modified airfoil profile.
Solution Approach 2:
The blade element incorporates elastic properties that allow it to dynamically adapt to airflow conditions. The elastic blade element body can deform to match airflow dynamics, and optional serrated edges can flex in response to wind speed and angle, enabling the structure to optimize its performance automatically without complex active control systems.
2Object-affected harmful factors
If flexible bristles are added to the trailing edge to reduce noise, then the noise is reduced, but the device complexity increases
Solution Approach 1:
Instead of modifying the entire blade structure, the noise reduction feature is applied locally at the trailing edge where it is most effective. The flexible bristles or serrated edges are positioned specifically at the trailing edge to address noise generation at that location, leaving the rest of the blade structure unchanged and simple.
Solution Approach 2:
The noise reduction elements such as flexible bristles or serrations are designed as simple, inexpensive additions that can be easily attached to the blade. These elements provide effective noise reduction without requiring complex or expensive mechanisms, and can be implemented as straightforward attachments to existing blades.
3Productivity
If a permeable flap is added to the trailing edge to improve efficiency, then the efficiency is improved, but the ease of manufacture decreases
Solution Approach 1:
The blade element utilizes a flexible, thin-walled structure that can be formed from relatively simple materials. The elastic blade element body can be manufactured as a thin-walled component that provides the necessary structural integrity while maintaining flexibility for aerodynamic performance, avoiding the need for complex rigid assemblies.
Solution Approach 2:
The blade element design serves multiple functions through a single integrated component: it modifies the airfoil profile to improve efficiency, reduces noise through its trailing edge configuration, and can be attached to existing blades using simple mounting methods. This multi-functionality reduces the need for separate components and simplifies manufacturing.
4Productivity
If the chord length is extended by mounting a blade element, then the efficiency is improved, but the weight of the blade increases
Solution Approach 1:
The blade element is constructed from composite materials that provide high strength-to-weight ratio. By using composite structures, the blade element achieves the necessary structural strength to handle aerodynamic loads while minimizing weight addition, thus improving efficiency without significant penalty in weight.
Solution Approach 2:
The elastic blade element body is designed to be lightweight while providing sufficient structural flexibility for aerodynamic performance. The dynamic properties allow the element to deform elastically under aerodynamic loads, providing structural efficiency without requiring excessive material mass, thus improving the weight-to-performance ratio.
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 solution improves wind turbine rotor blade efficiency and reduces aerodynamic noise, ensuring high safety through lightweight and adaptable design, while being easily retrofittable to existing blades, thus enhancing operational performance and safety.
Implementation Method 1
reducing noise by elastically deforming to match airflow dynamics
Implementation Method 2
The width extender is fixably connected along the trailing edge of an existing fan blade by, for example, adhesive bonding
Data Source
Figure 1
Figure 2~3
Figure 4~6
AI summary
Rotor blade element and method for improving the efficiency of a wind turbine rotor blade. A rotor blade element (40, 50, 60) adapted for mounting on a wind turbine rotor blade (5) is described. The wind turbine rotor blade (5) comprises a trailing edge (21), a suction side (33) and a pressure side (35). The blade element (40, 50, 60) comprises a trailing edge (46, 56), a first surface (41) and a second surface (42). The first surface (41) forms a pressure side surface portion. The second surface (42) comprises a suction side surface portion (43) and a contact surface (44).