Wind Turbine Impeller Blade Overlap for High Output and Low Noise
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wind power generation systems face challenges in increasing power generation efficiency and reducing noise when installed in limited areas, as larger blade diameters reduce installation density and increase noise due to friction and vortex generation.
Innovation Solution
An impeller design with 5 blades arranged at equal intervals, each inclined 10-20 degrees, and a flat wind-receiving surface, with adjacent blades partially overlapping to reduce noise and maintain high efficiency, is used within a wind tunnel with a streamline shape to enhance wind speed and reduce structural load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the diameter of the blade is increased to increase the area of the blade, then the power generation amount increases, but the installation number of wind power generation apparatuses in a limited area is reduced
Solution Approach 1:
The invention changes the blade configuration parameters by using 5 blades with a specific inclination angle of 10-20 degrees and optimized width distribution. This allows the impeller to achieve high power generation efficiency with a smaller diameter, enabling higher installation density in limited areas while maintaining productivity.
2Productivity
If the rotation speed of the impeller is increased to increase the power generation amount, then the power generation amount increases, but the noise generated by friction between the blades and air increases
Solution Approach 1:
The invention applies local quality optimization by varying the blade width along its length and setting the leading edge inclination angle to 10-20 degrees. This localized optimization reduces air friction and vortex generation at critical areas, thereby reducing noise while maintaining high rotation speed for power generation.
3Speed
If the number of blades is decreased to increase the rotation speed of the impeller, then the rotation speed increases, but the area of the blade that receives wind is reduced
Solution Approach 1:
The invention optimizes the blade parameters by using 5 blades with specific inclination angles and width distributions. This configuration achieves an optimal balance between rotation speed and wind-receiving area, allowing the impeller to rotate at high speeds while maintaining sufficient blade area for effective wind capture.
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 configuration allows for efficient power generation in limited spaces while minimizing noise and structural stress, maintaining high rotation efficiency and reducing vortex generation, thus enhancing overall power generation efficiency and noise reduction.
Implementation Method 1
a wind tunnel formed such that a longitudinal cross section cut along a central axis forms a substantial streamline shape
Implementation Method 2
a plurality of blades; and a hub which is provided with a rotating shaft at a center and around which the plurality of blades are arranged
Data Source
AI summary
An impeller for wind power generation includes: a plurality of blades; and a hub which is provided with a rotating shaft at a center and around which the plurality of blades are arranged at substantially equal intervals in a circumferential direction. The blade is formed to extend while widening a width toward an outer periphery of the impeller, a line segment connecting a leading edge and a trailing edge of the blade is inclined at an angle of approximately 10 degrees or more and approximately 20 degrees or less with respect to a plane perpendicular to a rotating shaft of the impeller, and in the plurality of blades, a trailing edge of a blade on a front side in a rotation direction of the impeller and a leading edge of a blade on a rear side in the rotation direction partially overlap each other in a front view of the impeller.