Grooved Inclined Blade Surface Structure for Low-Turbulence Airflow
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Solution Overview
Problem
In devices like blowers and fans, dimples on rotating blades increase surface area and wind resistance, hindering smooth rotation and fluid movement due to turbulence, which reduces efficiency.
Innovation Solution
A surface-processed structure featuring a series of blocks with inclined surfaces and fine grooves arranged to guide fluid flow efficiently, reducing contact resistance and promoting smooth airflow by forming air layers and vortex effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If dimples are provided on rotating blades to increase surface area and strengthen wind resistance, then the rotation of blades is improved, but the fluid movement efficiency deteriorates due to increased resistance and turbulence
Solution Approach 1:
The blade surface is segmented into multiple functional zones: a leading edge region with a first surface structure (different from dimples) that reduces turbulence, and a trailing edge region with a second surface structure that maintains wind resistance. This segmentation allows different parts of the blade to perform different functions, resolving the contradiction between needing wind resistance and avoiding turbulence.
Solution Approach 2:
Different surface structures are applied to different locations on the blade surface. The leading edge portion receives a structure optimized for reducing turbulence and drag, while other portions maintain structures for maximizing wind resistance. This local differentiation allows each region to contribute optimally to overall blade performance without the negative effects of uniform dimpling.
2Strength
If dimples are provided on rotating blades to increase surface area, then the wind resistance is strengthened, but the rotation smoothness deteriorates due to turbulence
Solution Approach 1:
The blade surface is divided into distinct regions with different surface structures. The leading edge region features a first surface structure designed to minimize turbulence and promote smooth airflow, while other regions have second surface structures for maximizing wind resistance. This spatial segmentation allows the blade to maintain both smooth rotation and effective wind resistance.
Solution Approach 2:
A specific surface structure is applied to the leading edge portion before the fluid flow reaches it, specifically designed to counteract the tendency toward turbulence. This preliminary anti-action prevents turbulence from developing in the first place, maintaining rotation smoothness while preserving wind resistance in other blade regions.
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 solution enables efficient fluid movement and reduced air resistance, allowing for smoother operation and higher airflow speeds while minimizing turbulence and contact resistance.
Implementation Method 1
Each of the plurality of blocks includes an inclined surface extending from upstream to downstream in the first direction with a distance from the target surface gradually increasing
Implementation Method 2
Each of the plurality of blocks includes a plurality of fine grooves provided on the inclined surface. The plurality of fine grooves are spaced apart from each other, are arranged side by side in a second direction orthogonal to the first direction, and extend from upstream to downstream in the first direction
Implementation Method 3
The plurality of fine grooves extend at a constant depth from an upstream end portion to a downstream end portion of the inclined surface in the first direction
Data Source
AI summary
A surface-processed structure includes a blocks arranged side by side in a first direction parallel to a target surface. The blocks are three-dimensional objects arranged on the target surface. Each of the blocks includes an inclined surface extending from upstream to downstream in the first direction with a distance from the target surface gradually increasing. The inclined surfaces of the blocks are arranged side by side on one line extending in the first direction. Each of the blocks includes a fine grooves provided on the inclined surface. The fine grooves are spaced apart from each other, are arranged side by side in a second direction orthogonal to the first direction, and extend from upstream to downstream in the first direction. The fine grooves extend at a constant depth from an upstream end portion to a downstream end portion of the inclined surface in the first direction.