NEW HYDRODYNAMIC OSCILLATOR TYPE FLOWMETER.

The objectives of this study are 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 is derived from feedback oscillator type fluidic flowmeters by eliminating both side walls based on a topological isomorphism between fluidic flowmeters and vortex flowmeters. Since the target which diverts the jet and generates alternate vortices is inevitable to the new oscillators, it is considered as a composite of vortex flowmeters and fluidic flowmeters. The rangeability of the proposed flowmeter appeared comparable to the original fluidic flowmeter.