Wind Turbine Blade Flow Guiding Device Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wind turbine blades face challenges in mounting and operational loads due to their shape, which affects aerodynamic performance and energy production, particularly in the root and transition regions, where existing designs either increase drag or are rigid and prone to separation.
Innovation Solution
The integration of a longitudinally extending flow guiding device group with modular, planar or plate-shaped elements in the transition region of the blade, which increases lift and energy yield by creating an air pocket and guiding airflow, while being more flexible to reduce peel forces and maintain attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rigid triangular-shaped flow guiding device is used, then airflow separation is delayed and aerodynamic performance is improved, but the device tends to separate from the blade surface when the blade bends
Solution Approach 1:
The flow guiding device is divided into multiple modular parts that can move independently relative to each other. This segmentation allows the device to adapt to blade bending while maintaining its aerodynamic function, preventing separation from the blade surface during operation
Solution Approach 2:
The flow guiding device transitions from a rigid structure to a dynamic, flexible structure that can adapt its shape and position in response to blade deformation. This dynamic capability allows the device to maintain attachment to the blade surface while preserving airflow guidance functionality
2Productivity
If the blade root region has a large circular cross-section, then mounting is easier and storm loads are reduced, but drag increases and energy production decreases
Solution Approach 1:
The flow guiding device is specifically positioned in the transition region between the root and airfoil regions, where it can improve aerodynamic performance without interfering with the structural requirements of the root region. This local application allows energy production enhancement while maintaining the beneficial low-drag characteristics of the root design
3Reliability
If the blade has an ideal airfoil shape throughout, then lift generation is maximized, but mounting becomes difficult and storm loads increase
Solution Approach 1:
The flow guiding device is applied locally in the transition region rather than throughout the entire blade. This localized approach allows the blade to maintain its optimal airfoil shape in the airfoil region for maximum lift generation, while the root region retains its structurally sound circular cross-section for easy mounting and storm load resistance
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 the annual energy yield by 1-2% compared to conventional blades, improves flexibility, and reduces the risk of the flow guiding device breaking off, while maintaining structural integrity and ease of mounting.
Implementation Method 1
increases lift and energy yield by creating an air pocket and guiding airflow
Implementation Method 2
guiding airflow from the pressure side along a front surface of the flow guiding device towards a trailing edge of the blade
Data Source
Figure 1
Figure 2
Figure 3~4(d)
AI summary
A wind turbine blade with a plurality of flow guiding device parts attached to a profiled contour on a pressure side of the blade is described. The longitudinally extending flow guiding device parts are grouped together to form a first flow guiding device group in the transition region of the blade.