Contoured obstacle assembly for vortex-type flowmeter

Details Contoured obstacle assembly for vortex-type flowmeter Contoured obstacle assembly for vortex-type flowmeter

1977-07-25

1978-09-26

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

System

G01F 132

Patent

active

041160584

ABSTRACT:
A flowmeter of the vortex type in which an obstacle assembly mounted in a flow tube causes vortices to be shed at a frequency that is a function of flow rate. The assembly includes a block fixedly mounted across the flow tube at right angles to the direction of flow, the block having a substantially square cross-section to present a flat face to the incoming fluid. The width of the block has its maximum value at the mid-point thereof and diminishes gradually toward either end where the width assumes its minimum value such that the upper and lower faces of the block are bellied and the front face has a double-convex contour. The maximum width value affords an efficient shedding action, the mean width value of the block being significantly smaller than the maximum value to substantially reduce the pressure drop produced by the meter.

REFERENCES:
patent: 3116639 (1964-01-01), Bird
patent: 3732731 (1973-05-01), Fussell, Jr.
patent: 3823610 (1974-07-01), Fussell, Jr.
patent: 3927564 (1975-12-01), Ketelsen
patent: 3948097 (1976-04-01), Kurita et al.

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