Wind Turbine Flow Deflection Device Shear Layer Control
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Solution Overview
Problem
Existing wind turbine systems face inefficiencies due to non-uniform wind flow, which can lead to reduced power output and increased strain on the drive train, particularly when the shear layer intersects with turbine blades, causing varying wind speeds and directional challenges.
Innovation Solution
The implementation of a flow deflection device (FDD) composed of earth with a shape-retaining shell, strategically placed near the wind turbine to maintain a stable shear layer and ensure uniform wind flow, utilizing computational fluid dynamics and wind speed measurements to optimize the FDD's dimensions and shape for improved aerodynamics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a flow deflection device is used to improve wind speed at blades, then power output is enhanced, but the device complexity and manufacturing complexity increase due to the need for shape-retaining shells and precise geometric configurations
Solution Approach 1:
The patent applies parameter changes by systematically varying the FDD's geometric parameters (internal diameter, height, shape angles, curvature radii) to optimize wind flow characteristics. Computational fluid dynamics analysis is used to determine optimal parameter values that maximize power output while maintaining manageable device complexity.
Solution Approach 2:
The patent employs composite construction by combining earth materials with shape-retaining shells (concrete, plastic, or other rigid materials). This composite approach allows the FDD to achieve the necessary structural integrity and geometric precision while using cost-effective materials, balancing power enhancement benefits against manufacturing complexity.
2Stability of the object's composition
If the FDD shape is maintained using a shell to ensure stable shear layer direction, then wind flow uniformity improves, but the manufacturing precision and ease of manufacture deteriorate due to the complexity of shaping and attaching shells
Solution Approach 1:
The patent utilizes flexible or semi-rigid shells that can be formed into complex curved shapes required for FDD construction. These shells maintain the necessary geometric precision for stable shear layer direction while being relatively easy to manufacture and install, reducing the overall manufacturing precision requirements.
Solution Approach 2:
The patent applies preliminary action by pre-forming the shell structures with the required geometric precision in controlled manufacturing environments before field installation. This approach ensures accurate FDD geometry for stable wind flow control while simplifying on-site construction and reducing the need for complex field fabrication operations.
3Productivity
If the FDD is positioned to affect the shear layer and maintain uniform wind flow, then productivity and power output increase, but the device complexity and installation complexity increase due to precise positioning requirements
Solution Approach 1:
The patent applies universality by designing the FDD system to perform multiple functions: deflecting wind flow, stabilizing the shear layer, and enhancing power output. This multi-functional design consolidates what would otherwise require multiple separate devices, reducing overall installation complexity while maintaining high productivity benefits.
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 solution enhances power output by maintaining a consistent wind speed across the turbine blades, reducing stress on the drive train and extending maintenance intervals by ensuring a uniform wind distribution, thereby optimizing energy production and reducing wind speed differentials.
Implementation Method 1
maintain a stable shear layer and ensure uniform wind flow
Implementation Method 2
optimize the FDD's dimensions and shape for improved aerodynamics
Implementation Method 3
flow deflection device (FDD) composed of earth with a shape-retaining shell, strategically placed near the wind turbine to maintain a stable shear layer and ensure uniform wind flow
Data Source
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AI summary
Aspects of the manufacturing of Flow Deflection Devices (FDDs) for wind turbines are presented as a system that requires adjustments in order to improve power output and adjust for changes in different conditions yet provides stability of shape.