Curved Rotor Blade Geometry for Wind Turbine Efficiency
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Solution Overview
Problem
Conventional wind turbine blade designs have efficiencies ranging from 20 to 30%, limiting the potential for kinetic energy capture from wind, and there is a need for innovative shapes that enhance aerodynamic performance and energy conversion.
Innovation Solution
A rotor blade with a unique geometrical shape featuring a primary neutral axis and sectional neutral axes that create a continuous or discontinuous curvature, allowing for a variable thickness airfoil cross-section, which increases the effective contact area with the airflow, enabling more efficient kinetic energy transformation into rotational movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional blade designs are used, then manufacturing simplicity is maintained, but energy capture efficiency remains limited at 20-30%
Solution Approach 1:
The patent applies curvature to the blade design by defining a primary neutral axis with continuous or discontinuous curvature and sectional neutral axes that create variable thickness airfoil cross-sections. This curved geometry increases the effective contact area with airflow, enabling more efficient kinetic energy transformation and achieving 45-55% efficiency compared to conventional flat blade designs.
Solution Approach 2:
The patent transitions from conventional two-dimensional blade cross-sections to three-dimensional curved surfaces defined by primary and sectional neutral axes. This dimensional enhancement creates variable thickness airfoil profiles that interact more effectively with airflow across multiple planes, maximizing energy capture from the fluid's kinetic energy.
2Area of moving object
If blade curvature is increased to improve energy capture, then contact surface area increases, but manufacturing difficulty increases
Solution Approach 1:
The patent segments the complex curved blade geometry into definable components: a primary neutral axis with continuous or discontinuous curvature and multiple sectional neutral axes. This segmentation allows the complex shape to be constructed from simpler curved elements, making manufacturing more feasible while maintaining the increased contact surface area needed for high efficiency.
Solution Approach 2:
The patent uses parameter changes by defining the blade geometry through variable curvature radii and airfoil thickness ratios along the span. These parameters can be adjusted to optimize both the contact surface area for energy capture and the manufacturability of the blade, balancing efficiency gains with production feasibility.
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 design achieves efficiency values between 45 and 55%, surpassing conventional designs by optimizing energy capture through a greater contact surface area and angled airflow interaction, thereby enhancing energy conversion into rotational movement.
Implementation Method 1
its cross-section uses a variable airfoil as a function of taking advantage of fluid-dynamic forces generated once the fluid passes through the inferior and superior zone of the profile
Implementation Method 2
the present invention refers more specifically to the non-conventional design of the shape of a rotor blade belonging to a machine which generates power from the transformation of kinetic energy found in moving fluids
Data Source
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AI summary
The invention is entirely in keeping with the industry of renewable energies, particularly those using kinetic energy from fluids. The invention comprises the non-conventional design of the shape or geometry of a rotor blade, such rotor being or not being coupled to a machine which generates power from the transformation of kinetic energy that a fluid in movement has. The fundamental purpose of the design is to improve the efficiency in which fluid kinetic energy is transformed, thus being able to obtain better power coefficient values and therefore better performance when generating power. Said rotor must have as a minimum two (2) blades (e) for the operation thereof and is primarily designed for wind power generation applications.