Boundary layer control diffuser for a wind tunnel or the like
US5099685A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 9, 1990 |
| Grant date | Mar 31, 1992 |
| Priority date | — |
| Expiry date | Aug 9, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M9/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A wind tunnel having a test section and a fan section, interconnected by two passageways to form a recirculating air flow through said sections. There is a diffuser immediately downstream of the test section, and a second diffuser immediately downstream of the fan section. Each diffuser has an intermediate flow section where the side wall extends radially outwardly in a downstream direction at a relatively sharp angle. At the upstream end of the intermediate section there is a peripheral suction slot to draw in boundary layer air, and a by-pass passageway to discharge the air tangentially in a downstream location of the diffuser. This enables a substantial reduction in air velocity in a relatively short axial length.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.