REAL-TIME NON-STATIONARY FLOWMETER

摘要

The invention relates to a system for the real-time measurement of the instantaneous flow rate of a fluid having a stationary or non-stationary flow in a duct, which comprises a fluid flow member (1) provided with at least two pressure taps (A, B) on the wall, a means (2) for measuring a pressure difference and coupled to the two pressure taps (A, B), and a calculation means (3) programmed for calculating the real-time flow rate by solving an ordinary non-linear differential equation linking the instantaneous flow rate with the pressure difference, the pressure difference in said formula being positive or negative depending on the variation of the flow rate of the fluid in the duct and/or the flow direction of the fluid, wherein the flow member (1) includes a filter (4) provided between the two pressure taps (A, B) in order to increase the energy loss.