A new hydrodynamic oscillator type flowmeter.

Both vortex flowmeters and fluidic flowmeters form a family of the hydrodynamic oscillator type which have geometrical and hydrodynamic complementarity. The objectives of this study were to propose a new hydrodynamic oscillator type flowmeter and to promote a unified approach to these flowmeters. Proposed flowmeters consist of a main nozzle and a bluff cylinder, so called target, which was derived from feedback oscillator type fluidic flowmeters by eliminating both side walls based on a topological isomorphism between fluidic flowmeters and vortex flowmeters. The rangeability of the proposed flowmeter appeared comparable to the original fluidic flowmeter. (A)