Method and apparatus for online flow control over the span of a high aspect ratio slot jet
US7563322B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 9, 2007 |
| Grant date | Jul 21, 2009 |
| Priority date | — |
| Expiry date | Nov 3, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C2/20
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method and apparatus for controlling local flow along a slot jet with applications to airknives is disclosed. The airknife provides improved options for on-line control over coating thickness and edge build-up prevention. The gap of the slot nozzle of the airknife can remain constant while the outflow pattern is controlled by a series of preset throttle valves in combination with a single moving component, the multi-port aero-valve. This valve can be actuated locally or remotely, in rotation or translation, thereby changing gradually from a conventional uniform outflow to one which increases in velocity and mass flow rate along the airknife span to produce a bow effect. The valve can also change gradually from a conventional uniform outflow to one which increases in velocity, mass flow rate and outflow angle along the span to simulate bow effect in combination with fan-like outflow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.