Retrofitting Vortex Generators on Wind Turbine Blades
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Solution Overview
Problem
Wind turbine manufacturers face challenges in improving the efficiency of existing blades without replacing them, as arbitrary replacement is not feasible, and there is a need to enhance aerodynamic properties to increase energy production and extend turbine lifetime.
Innovation Solution
A method of retrofitting vortex generators on wind turbine blades by identifying a separation line on the suction side based on deposit distribution and mounting vortex panels between this line and the leading edge, using optical or chemical means to determine deposit patterns and positioning the generators optimally for improved airflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If vortex generators are retrofitted on existing wind turbine blades, then aerodynamic efficiency is improved, but blade complexity increases
Solution Approach 1:
The blade surface is segmented into different flow regions (laminar, transition, turbulent) based on deposit distribution patterns, and vortex generators are selectively placed only in specific segments where they are most effective, rather than applying modifications across the entire blade surface
Solution Approach 2:
Vortex generators are placed locally at specific chord positions and span locations where flow separation occurs, rather than uniformly across the blade. The placement is determined by local flow conditions identified through deposit patterns, ensuring modifications are applied only where aerodynamically beneficial
2Duration of action of stationary object
If blade replacement is avoided to extend turbine lifespan, then resource consumption is reduced, but aerodynamic efficiency deteriorates
Solution Approach 1:
Deposit patterns are used as preliminary indicators to identify flow separation locations before significant performance degradation occurs. This allows proactive placement of vortex generators to prevent efficiency loss, rather than waiting for blades to fail or requiring replacement
Solution Approach 2:
The blade's natural deposit accumulation pattern is utilized as a diagnostic tool to identify where flow separation occurs. The blade essentially marks its own problem areas through deposit distribution, which then guides the placement of corrective vortex generators
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 method enhances the aerodynamic properties of wind turbine blades, leading to increased energy yield and prolonged turbine performance by optimizing airflow and reducing drag, even on blades in long-term operation.
Implementation Method 1
mounting one or more vortex panels including a first vortex panel comprising at least one vortex generator on the suction side of the wind turbine blade between the separation line and the leading edge
Data Source
AI summary
A method of retrofitting vortex generators on a wind turbine blade is disclosed, the wind turbine blade being mounted on a wind turbine hub and extending in a longitudinal direction and having a tip end and a root end, the wind turbine blade further comprising a profiled contour including a pressure side and a suction side, as well as a leading edge and a trailing edge with a chord having a chord length extending there between, the profiled contour, when being impacted by an incident airflow, generating a lift. The method comprises identifying a separation line on the suction side of the wind turbine blade, and mounting one or more vortex panels including a first vortex panel comprising at least one vortex generator on the suction side of the wind turbine blade between the separation line and the leading edge of the wind turbine blade.