| 摘要 |
A vortex shedding flowmeter in which an obstacle is mounted within a flow conduit to produce periodic vortices whose frequency is a function of the flow rate of the fluid passing through the conduit. The conduit is interposed between an upstream and a downstream pipe section in the line conveying the fluid to be metered. To render the flowmeter insensitive to differences in velocity distribution in the fluid entering the flow conduit, the internal diameter of the conduit is made smaller than that of the upstream pipe section to create a constriction in the flow passage which renders the flow distribution profile more uniform and thereby improves the accuracy and reliability of the meter.
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