Vortex-shedding flowmeter having two bluff bodies

Details Vortex-shedding flowmeter having two bluff bodies Vortex-shedding flowmeter having two bluff bodies

1980-09-18

1982-09-21

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

By measuring vibrations or acoustic energy

G01F 132

Patent

active

043500471

ABSTRACT:
A vortex-shedding flowmeter comprising two stationary vortex-shedding cross-members (i.e., bluff bodies) disposed transversely to a stream of fluid. Each cross-member has a bluff face with sharp Karman vortex generating edges with independently selected edge to edge widths d of from 10 to 40% of the inside width of the conduit through which the fluid flows and lengths 1 of from 0.3 to 2.0d. The second cross-member is disposed downstream of the first cross-member a distance of from 4 to 15 times the width d of the first cross-member. Any sensor may be used in any location provided it or they sense the Karman vortices generated by co-action of the two cross-members. This flowmeter provides strong signals with a high signal to noise ratio and high Strouhal number.

REFERENCES:
patent: 3572117 (1971-03-01), Rodely
patent: 3996796 (1976-12-01), Adler

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