Wind Turbine Spinner Aerodynamic Flow Guidance
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Solution Overview
Problem
Wind turbines experience inefficiency due to poor aerodynamic profiles at the inner rotor section, resulting in unutilized kinetic energy from wind passing through the rotor blades.
Innovation Solution
A spinner is mounted on the hub of the wind turbine, covering a substantial portion of the inner rotor blade's cylindrical section, featuring a front portion with a smooth circumference to guide wind energy towards the profiled outer sections, enhancing aerodynamics and energy capture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the rotor blade has a cylindrical inner portion without aerodynamic profiling, then the structure is simple and manufacturing is easier, but the aerodynamic efficiency is poor and kinetic energy is not effectively utilized
Solution Approach 1:
The rotor blade is divided into two distinct sections: a cylindrical inner portion for structural simplicity and a profiled outer portion for aerodynamic efficiency. This segmentation allows each section to be optimized independently, maintaining ease of manufacture for the inner portion while capturing kinetic energy effectively with the profiled outer portion.
Solution Approach 2:
Different aerodynamic properties are applied to different sections of the rotor blade. The inner portion maintains a simple cylindrical shape for structural integrity, while the outer portion features an aerodynamic profile to optimize wind energy capture. This local differentiation resolves the contradiction between manufacturing simplicity and energy efficiency.
2Loss of energy
If the rotor blade inner portion is covered with a spinner, then aerodynamic efficiency is improved by redirecting wind flow, but the device complexity increases
Solution Approach 1:
The spinner is merged with the hub structure, forming an integrated component rather than a separate attachment. This merging approach reduces overall device complexity while maintaining the aerodynamic benefit of redirecting wind flow around the rotor blade inner portion.
Solution Approach 2:
The spinner acts as an intermediary element between the wind flow and the rotor blade inner portion. It redirects the wind flow smoothly around the cylindrical section, preventing turbulence and energy loss, while its integration with the hub minimizes additional structural complexity.
3Loss of energy
If the spinner front portion has a smooth circumference, then wind flow is guided more effectively to profiled sections, but manufacturing precision requirements increase
Solution Approach 1:
The spinner front portion incorporates a smooth, curved circumference that is aerodynamically optimized to guide wind flow. This curved geometry is achieved through standard manufacturing processes and does not require excessive precision, while still effectively redirecting wind to the profiled outer portion of 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
The spinner increases energy production by redirecting wind kinetic energy to the profiled rotor blade sections, reducing energy loss and enhancing the overall efficiency of the wind turbine.
Implementation Method 1
the spinner is adapted to cover a substantial portion of the inner portion of the rotor blade in wind direction... the front portion is adapted to be positioned in front of the cylindrical inner portion of the at least one rotor blade... with a back end of the front portion having a substantial smooth circumference
Data Source
AI summary
A spinner configured to be mounted on a hub of a wind turbine to which at least one rotor blade is connected. The spinner defines a front portion configured to be positioned in front of an inner portion of the at least one rotor blade, and is structurally configured to cover a substantial portion of the inner portion of the at least one rotor blade in a wind direction during operation of the wind turbine. Further described is a wind turbine comprising the above-described spinner and a method for increasing the efficiency of an existing wind turbine, wherein the method includes mounting the above-described spinner to the hub of a wind turbine.