It is shown how to design a new method (DFFM) of flow metering in pipes from basic principles. The method relies on the well known drag force on a cylindrical body and the force measurement by a load cell. The drag force is exclusively measured in the axial flow direction, the only one that contributes to the flow rate. That way disturbing tangential swirl components which do not contribute remain unconsidered. By means of an upstream screen the meter is desensitized to disturbing axial velocity profile distortions. Testing with various installations demonstrates the main features and the error bar to be expected.

Issue Section:
Additional Technical Papers
Keywords:
flowmeters, drag, pipe flow, external flows, force measurement
Topics:
Calibration, Cylinders, Design, Drag (Fluid dynamics), Flow (Dynamics), Flowmeters, Pipes, Stress, Force measurement
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Copyright © 2004
 by ASME
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