Method and device for bi-directional low-velocity flow measurement
US6463810B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 7, 2000 |
| Grant date | Oct 15, 2002 |
| Priority date | — |
| Expiry date | Feb 7, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/44
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A precision flowmeter is adapted to measure at least one of mass flow rate and flow velocity of a fluid, at steady or transient state, in a bi-directional low-velocity flow system. The flowmeter includes pressure taps and static pressure taps, passing from the interior of a tubular main body and through a wall of the tubular main body, and a plurality of impact tubes located circumferentially spaced-apart and extending axially parallel through a conical wall of the tubular main body toward a center of the cylindrical throat portion. The pressure taps correspond in number to the plurality of impact tubes and communicate with inner ends of the corresponding plurality of impact tubes, and static pressure taps pass through walls of the upstream and downstream tubular channel sections and through the tubular throat portion. A method for measuring at least one of flow rate and flow velocity of a fluid is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.