Rotating Blade Flow Path Design for Energy Conversion
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Solution Overview
Problem
Existing rotating blades and air foils have limited energy conversion efficiency when converting wind energy into mechanical or lifting force, as the shape and structure of the blades and foils affect the energy transfer from fluid flow.
Innovation Solution
The design incorporates multiple arc-shaped flow paths on the rotating blades and air foils with larger inlet cross-sectional areas that gradually decrease to smaller outlets, enhancing fluid acceleration and energy conversion by increasing rotational frequency and lifting force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional blade structures are used, then the device is simple to manufacture, but the energy conversion efficiency is limited
Solution Approach 1:
The blade surface is segmented into multiple flow paths with different cross-sectional areas, allowing fluid to be divided and directed through separate channels. This segmentation enables optimized energy extraction at different locations on the blade surface, improving overall energy conversion efficiency while maintaining a manufacturable segmented structure
Solution Approach 2:
Different regions of the blade are assigned different local qualities through varying flow path cross-sectional areas. The inlet regions have larger cross-sectional areas to capture more fluid energy, while outlet regions have smaller areas to optimize exhaust flow. This local differentiation maximizes energy extraction efficiency at each specific location on the blade
2Speed
If flow path cross-sectional area is decreased to increase fluid velocity, then kinetic energy conversion improves, but fluid flow rate may be reduced
Solution Approach 1:
The fluid flow is segmented into multiple parallel flow paths rather than forcing all fluid through a single narrow channel. This allows the system to maintain higher overall flow rate while still achieving high velocity in individual paths, as the total flow is distributed across multiple channels with optimized cross-sectional areas
Solution Approach 2:
The solution transitions from a single-dimensional flow path to a multi-dimensional array of flow paths arranged across the blade surface. By utilizing the two-dimensional surface area of the blade for multiple parallel flow paths, the system increases both fluid velocity in individual paths and total fluid flow rate simultaneously
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 design significantly increases energy conversion efficiency by accelerating fluid flow, resulting in higher rotational speeds and mechanical energy generation for blades, and increased lifting force for air foils, while minimizing drag and entrance/exit losses.
Implementation Method 1
the cross-sectional area of the inlet gradually decreases toward the outlet
Data Source
AI summary
According to one embodiment of the present invention, a rotating blade, having a collision face that collides with fluid and is rotated by the flow of said fluid, has at least one flow path that has been caved in from said colliding face; said flow path is located forward with respect to said rotation direction so that it is located in the rear with respect to the inlet wherein said flow is introduced and said rotation direction, and it has an outlet from which said fluid exits. Here, the cross-sectional area of said inlet may be greater than the cross-sectional area of said outlet. In addition, the cross-sectional area of said inlet may gradually decrease toward said outlet.