Tangentially directed acoustic jet controlling boundary layer
US6390418B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 1999 |
| Grant date | May 21, 2002 |
| Priority date | — |
| Expiry date | Feb 25, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T50/10
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The nozzle of an acoustic jet directs high momentum flux gas particles essentially tangentially into the boundary layer of the flow in a diffuser, an engine air inlet, a jet engine gas flow path or on the suction surface of an airfoil, the gas particles in the chamber of the tangential acoustic jet being replenished with approaching low momentum flux particles drawn from the gas flow in a direction normal to the surface, thereby to provide a net time-averaged flow of increased momentum flux particles to defer the onset of boundary layer separation and/or reduce the thickness of the boundary layer. The acoustic jet is driven by a gas pressure oscillation generator which may be a loudspeaker, a resonant solenoid piston, a cranked piston, or the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.