Suction-Hole Enclosure for Vortex-Induced Vibration Suppression
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Solution Overview
Problem
The installation and operation of wind power generation devices are restricted by regional wind conditions, leading to vortex-induced vibrations that can cause instability and damage, particularly due to the limitations imposed by wind speed and the inefficacy of existing vibration suppression methods like helix lines, which are costly and environmentally noisy.
Innovation Solution
An enclosure with suction through holes distributed circumferentially around its perimeter, which uses a suction apparatus to restrain the airflow boundary layer from detaching, thereby suppressing vortex-induced vibrations and adapting to varying wind speeds without significant cost increases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If helix lines are used to suppress vortex-induced vibrations, then vibration suppression effect is improved, but manufacturing cost and environmental noise increase
Solution Approach 1:
The patent extracts the boundary layer airflow that causes vortex-induced vibrations and removes it from the system through suction holes. By sucking out the boundary layer airflow, the vortex formation is eliminated, achieving vibration suppression without generating environmental noise like helix lines do.
Solution Approach 2:
The patent replaces the mechanical helix line system with a suction-based system using suction holes and airflow control. This substitution eliminates the mechanical contact and noise generation of helix lines while achieving the same vibration suppression function through aerodynamic means.
2Reliability
If helix lines are used to suppress vortex-induced vibrations, then vibration suppression effect is improved, but manufacturing cost increases
Solution Approach 1:
The patent extracts the boundary layer airflow through simple suction holes and removes it from the system. This approach eliminates the need for complex helix line installations and reduces manufacturing costs while maintaining vibration suppression effectiveness.
Solution Approach 2:
The patent uses simple suction holes that can be easily manufactured and installed, replacing expensive helix lines. The suction system uses readily available components and simple structural modifications, significantly reducing manufacturing and installation costs.
3Reliability
If suction is applied to restrain boundary layer detachment, then vortex-induced vibrations are suppressed, but energy consumption increases
Solution Approach 1:
The patent applies suction only at specific locations where vortex-induced vibrations occur, rather than throughout the entire structure. By concentrating suction at critical points, energy consumption is minimized while maintaining effective vibration suppression.
Solution Approach 2:
The patent uses partial suction action only where boundary layer detachment causes problems, rather than applying suction universally. This selective approach reduces energy consumption while achieving the necessary vibration suppression effect.
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 effectively reduces vortex-induced vibrations, enhances stability, and meets ecological noise standards, allowing for flexible operation across different wind conditions during both installation and operation, while also providing cooling and heat exchange functions.
Implementation Method 1
The enclosure is further provided with a suction apparatus, and the suction apparatus is configured to perform suctioning to the suction through holes from outside to inside, to restrain an airflow boundary layer at an outer surface of the enclosure from being detached from the outer surface
Implementation Method 2
the suction apparatus is configured to perform suctioning to the suction through holes from outside to inside
Data Source
AI summary
An enclosure with a vortex-induced vibration suppression function and a method for suppressing vortex-induced vibration are provided. The enclosure is provided with suction through holes extending through a peripheral wall thereof, the suction through holes are distributed in a circumferential direction of the enclosure. The enclosure is further provided with a suction apparatus, and the suction apparatus can perform suctioning to the suction through holes from outside to inside, to restrain a boundary layer at an outer surface of the enclosure from being detached from the outer surface. By the suctioning, the boundary layer can be “adsorbed” on the outer surface of the tower, thereby restraining or directly preventing the boundary layer from being detached from the outer surface of the tower, and reducing or eliminating the cause of the vertex-induced vibration.