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1. AU1983014794 - NARROW PROFILE VORTEX SHEDDING BODY

Office
Australia
Application Number 14794/83
Application Date 01.04.1983
Publication Number 1983014794
Publication Date 24.12.1986
Publication Kind A
IPC
G01F 1/32
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME
1Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
05by using mechanical effects
20by detection of dynamic effects of the fluid flow
32by swirl flowmeter, e.g. using Karman vortices
CPC
G01F 1/3218
GPHYSICS
01MEASURING; TESTING
FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
1Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through the meter in a continuous flow
05by using mechanical effects
20by detection of dynamic effects of the fluid flow
32by swirl flowmeter, e.g. using Karman vortices
3209using Karman vortices
3218bluff body design
Applicants Foxboro Company, The
Inventors Marsh, David W.
Priority Data 06365679 05.04.1982 US
Title
(EN) NARROW PROFILE VORTEX SHEDDING BODY
Abstract
(EN) A body (11) for improved shedding of vortices has a short downstream length, e.g. 0.3 cm, yet is capable of excellent flow metering performance. The body includes an upstream elongate thin plate (19) spanning the inner diameter of a conduit, and one or more downstream sections (21). Generally, these sections are in the form of cylindrical rods of various cross-sections, with their longitudinal axes parallel to that of the plate. These sections may be separated from the plate, or rigidly attached to the downstream side thereof. By simultaneously maintaining the ratio of the width (HF) of the thin plate to the overall width (HT) of the downstream sections within the range from 1.0 to 2.2, and the ratio of the width of the thin plate to the diameter of the conduit within the range from 0.1 to 0.3, enhanced linearity of signal is achieved. This results in a narrow profile flowmeter assembly which occupies the same amount of space as a conventional orifice plate.