Unsteady flow meter
US7519483B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 16, 2005 |
| Grant date | Apr 14, 2009 |
| Priority date | — |
| Expiry date | Feb 16, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/50
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention makes it possible to measure, in real time, the flow of a fluid that is incompressible while having an unsteady flow. The pressure measuring system is primarily comprised of a negative-pressure element (1) placed within the flow and provided with two wall pressure taps (A, B). A means (2) for measuring a pressure difference connected to the pressure taps (A, B) enables the following formula to be solved: dq(t)/dt+α(q(t))=β×Δp(t) directly stemming from fundamental equations of fluid mechanics and/or: Δp(t) represents the pressure difference measured by the sensor; q(t) represents the sought volume flow rate, and; α represents a function of the geometry of the negative-pressure element, of the fluid and of the flow q(t), the particularity of this formula being the consideration of the direction of flow in the second term of the left member of the formula.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.