Flowmeter with a fluid dynamic target

Details Flowmeter with a fluid dynamic target Flowmeter with a fluid dynamic target

1988-08-15

1990-03-27

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

By measuring thrust or drag forces

G01F 128

Patent

active

049110225

ABSTRACT:
The flowmeter of the present invention comprises a fluid dynamic target of an elongated planar geometry having an airfoil shaped cross section disposed generally parallel to the direction of the fluid flow and extending into the fluid stream, which is supported in a rotating arrangement about an axis generally parallel to the lengthwise axis of the fluid dynamic target wherein the airfoil shaped cross section remains generally parallel to the direction of the fluid flow during the rotating movement of the fluid dynamic target, which rotating movement is biased by a mechanical spring or the Earth's gravitational force. The time rate of the fluid flow is determined from the angular displacement of the fluid dynamic target about the rotating axis, which angular displacement results from a combination of the lift and drag forces on the fluid dynamic target created by the fluid flow moving therearound.

REFERENCES:
patent: 2302672 (1942-11-01), Buckley
patent: 2917922 (1959-12-01), Morse

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