System for amplifying flow-induced vibration energy using boundary layer and wake flow control
US9010197B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 25, 2013 |
| Grant date | Apr 21, 2015 |
| Priority date | — |
| Expiry date | Jan 4, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15D1/0065
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A system includes a body disposed in a flow field and a flow disturbance device configured to induce tuned and controlled flow fluctuations in the flow field that are coupled into and amplified by a boundary layer of the body and the flow field. The flow disturbance device is located on, within, or separated from the body. The body may be a bluff body or an airfoil and may be cylindrical in shape. The flow field is a fluid or plasma having a sub-critical flow rate. The flow disturbance device may be stationary or vibrating. The flow fluctuations are tuned to a frequency within an instability frequency band of the boundary layer. The frequency band may be a frequency band that naturally amplifies the flow fluctuations and alters the body's downstream vortex shedding pattern such that vortex-induced vibration characteristics experienced by the body are increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.