Feasibility and Analysis of Fluidic-Type Devices in Gas Flow Measurements. Final Report March 1987-March 1988

摘要

Extensive experimental investigations of a variety of fluidic flow meters based on the Coanda principle have been conducted, in order to find a design suitable for use as a compact residential gas meter. As the result of these investigations a fundamentally different type of fluidic oscillator has been invented, which has been named the Trapped Vortex Pair (TVP) flow meter. The TVP fluidic flow meter operates over the range of 1.75 cfh to 146 cfh with a pressure drop of 0.59 inches of water and a linearity of plus or minus 3.0%. A much wider range of operation from 0.5 cfh to 200 cfh can be achieved if the pressure drop constraint is relaxed.