Vortex-shedding flowmeter having two bluff bodies
US4350047A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 1980 |
| Grant date | Sep 21, 1982 |
| Priority date | — |
| Expiry date | Sep 18, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/3218
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A vortex-shedding flowmeter comprising two stationary vortex-shedding cross-members (i.e., bluff bodies) disposed transversely to a stream of fluid. Each cross-member has a bluff face with sharp Karman vortex generating edges with independently selected edge to edge widths d of from 10 to 40% of the inside width of the conduit through which the fluid flows and lengths 1 of from 0.3 to 2.0d. The second cross-member is disposed downstream of the first cross-member a distance of from 4 to 15 times the width d of the first cross-member. Any sensor may be used in any location provided it or they sense the Karman vortices generated by co-action of the two cross-members. This flowmeter provides strong signals with a high signal to noise ratio and high Strouhal number.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.