Wind Wheel Blade Geometry Optimization for Air Speed
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Solution Overview
Problem
Conventional wind wheels are inefficient in producing air speed and wind power due to suboptimal structural parameters of their blades, such as blade shape, radial length, and deflection angles, which limit their performance.
Innovation Solution
The wind wheel design features specific geometric parameters including the distances R1, R2, and outer diameter R, along with precise angle conditions (α, β, γ, δ) between the hub and blade edges, optimizing the formation of pressure and suction surfaces to enhance air duct efficiency and air speed production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional blade structural parameters are used, then the wind wheel structure is simple, but the air speed and wind power output are insufficient
Solution Approach 1:
The patent applies parameter changes by optimizing specific geometric parameters of the blades including the distance R1 (0.35R≤R1≤0.45R), distance R2 (0.8R≤R2≤0.9R), and various angles (α: 65°≤α≤66°, β: 61.5°≤β≤62.5°, γ: 29.5°≤γ≤30.5°, δ: 16°≤δ≤17.2°). These parameter optimizations resolve the contradiction by achieving significantly improved air speed and wind power output while maintaining reasonable structural complexity through defined parameter ranges.
2Productivity
If blade shape and radial length are optimized, then air duct efficiency improves, but manufacturing precision requirements increase
Solution Approach 1:
The patent defines specific parameter ranges for blade geometry (R1: 0.35R≤R1≤0.45R, R2: 0.8R≤R2≤0.9R, and angle parameters α, β, γ, δ within specific ranges) that optimize air duct efficiency while providing manufacturable tolerances. The arc connection design between outer edge and leading edge further facilitates manufacturing within these parameter ranges.
Solution Approach 2:
The patent employs curved arc connections between the outer edge and leading edge, and between trailing edge and outer edge, rather than straight lines. This curvature design optimizes airflow through the air duct while providing more forgiving manufacturing tolerances compared to sharp angular transitions, thus resolving the contradiction between air duct efficiency and manufacturing precision requirements.
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 optimized structural parameters result in significantly increased air speed and wind power output compared to conventional designs, making the wind wheel more efficient.
Implementation Method 1
The inner edge, the outer edge, the leading edge, and the trailing edge are connected sequentially to each other to form a pressure surface and a suction surface of each blade
Data Source
AI summary
A wind wheel including a plurality of blades and a hub. The plurality of blades each includes an inner edge, an outer edge, a leading edge, and a trailing edge. In a top view of the orthographic projection of the wind wheel, the maximum distance between the center O of the hub and the outer edge of the plurality of blades refers to the outer diameter R; the distance between the center O and the cross point A1 of the inner edge and the leading edge is named R1; the outer edge is connected to the leading edge via an arc; the distance between the center O and a joint A2 of the arc and the leading edge is named R2; and the distances R1, R2, and the outer diameter R satisfy the following conditions: 0.35R≤R1≤0.45R; 0.8R≤R2≤0.9R.