Method and apparatus for determining fluid flow

Details Method and apparatus for determining fluid flow Method and apparatus for determining fluid flow

1979-10-09

1981-11-17

Ruehl, Charles A.

Measuring and testing

Volume or rate of flow

By measuring vibrations or acoustic energy

364510, G01F 166

Patent

active

043004016

ABSTRACT:
A method and apparatus for determining volumetric fluid flow rate in an arbitrarily shaped fluid conveyance are disclosed. A plurality of functions, f.sub.j (p,m.sub.k) (where p is a position in the conveyance and m.sub.k depends upon the Reynolds number of the fluid flow), each function being approximately representative of the fluid flow velocity across the conveyance, are linearly combined to approximate the velocity, P(p), of the fluid flow at any point in a plane normal to fluid flow. The scalar constants A.sub.j,k, of the linear combination ##EQU1## are estimated by solving a system of linear equations, ##EQU2## in which acoustical measurements along the paths y.sub.i through the conveyance provide an estimate, v.sub.meas(i), of the actual average velocity v.sub.i at paths y.sub.i. The average fluid velocity and hence volumetric flow across the conveyance can then be determined by taking an area integral of the linear combination ##EQU3##

REFERENCES:
patent: 3564912 (1971-02-01), Malone et al.
patent: 3940985 (1976-03-01), Wyler
patent: 4024760 (1977-05-01), Estrada, Jr.
patent: 4102186 (1978-07-01), Brown
patent: 4109523 (1978-08-01), Teyssandier
S. G. Fisher, et al.--"Ultrasonics as a Standard for Volumetric Flow Measurement"--1972--pp. 139-159.

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