Asymmetric Fan Vane Design for Heat Dissipation and Noise Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional air-cooling heat exchangers are inadequate for effectively dissipating heat from high-performance electronic elements due to limitations in manufacturing and operating costs, and they fail to provide sufficient heat removal.
Innovation Solution
A fan device with a unique vane design featuring a hub and blade assemblies, where the second blade is farther away from the windward side and has a greater angle with the windward side compared to the first blade, creating a downforce flow that enhances heat dissipation while minimizing noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional air-cooling heat exchangers are used, then manufacturing and operating costs are reduced compared to liquid-cooling systems, but heat dissipation performance is insufficient for high-performance electronic elements
Solution Approach 1:
The fan blade employs asymmetric geometry where the second blade is positioned farther from the windward side and forms a greater angle with the windward side compared to the first blade. This asymmetric configuration creates a downforce flow pattern that enhances heat dissipation performance while maintaining the cost-effective air-cooling approach
Solution Approach 2:
Different portions of the blade are designed with distinct geometric characteristics - the first blade has a specific angle and positioning relative to the windward side, while the second blade has a greater angle and is positioned farther away. This local differentiation creates optimized airflow patterns for enhanced cooling performance
2Temperature
If fan blade geometry is optimized for maximum wind pressure and flow rate, then heat dissipation efficacy is improved, but noise levels may increase
Solution Approach 1:
The asymmetric blade configuration with the second blade positioned farther from and at a greater angle to the windward side creates a downforce flow that efficiently moves air for heat dissipation while the specific geometric relationships are designed to minimize turbulence and noise generation
Solution Approach 2:
The blade incorporates curved surfaces and rounded edges rather than sharp angles, with the first and second blades featuring smooth transitions that reduce airflow separation and turbulence, thereby minimizing noise while maintaining effective heat dissipation
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 fan device achieves improved heat dissipation efficacy and reduced noise levels, with maximum wind pressure and flow rates while maintaining a low noise profile, effectively addressing the limitations of conventional air-cooling systems.
Implementation Method 1
The angle of between an extending surface of the second side edge of the second blade extending towards the windward side and the windward side is greater than another angle of between an extending surface of the first side edge of the first blade extending towards the windward side
Data Source
AI summary
A fan device includes a frame including an axle base and a vane including a hub disposed on the axle base pivotally and blade assemblies disposed circumferentially on the sidewall surface. The hub includes a windward side and a sidewall surface. Each blade assemblies includes a first blade and a second blade protruded from the sidewall surface radially. The second blade is farther away than the first blade from the windward side. The angle of between an extending surface of a second side edge of the second blade extending and the windward side is greater than another angle of between an extending surface of a first side edge of the first blade extending and the windward side. The gap between the partial second side edge and the windward side is less than another gap between the first side edge and the windward side.