Fludic oscillator flowmeters

Details Fludic oscillator flowmeters Fludic oscillator flowmeters

1987-06-26

1989-06-13

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

By measuring vibrations or acoustic energy

137835, G01F 120

Patent

active

048380911

ABSTRACT:
A fluidic-oscillator type flowmeter has an inlet nozzle (1) leading into a chamber (2) with diverging side walls (3a, 3b). A splitter (8) has a blunt end opposite the inlet nozzle and defines outlet paths (4a, 4b) which lead from the chamber. The shape and position of the splitter are such that oscillating flow is encouraged across its face. Feedback channels (5a, 5b) lead from the side walls back to control ports (7a, 7b) which open into the chamber. The relative position of the splitter and feedback channel entrances is such that the downstream corners of the entrances to the feedback channels lie in the oscillating path of the edge of the flow which separates from the face of the splitter when the meter is in use.

REFERENCES:
patent: 3504691 (1970-04-01), Campagnuolo et al.
patent: 3690171 (1972-09-01), Tippetts et al.
patent: 4550614 (1985-11-01), Herzl
"Fluidic Oscillators", by C. J. Campagnuolo et al. Instruments and Control Systems, Jun. 1970, pp. 99-103.
"Experimental Investigation of a Fluidic Volume Flowmeter", by M. P. Wilson et al., Transactions of the ASME, Nov. 1969, pp. 1-4.
"Development of a Wall-Attachment Fluidic Oscillator Applied to Volume Flow Metering", by R. B. Beale et al., Hydrodynamic Oscillators, pp. 989-996.
"Fluidic Devices", E. F. Humphrey et al., Fluidics, 1965, pp. 8-18.
"Experimental and Theoretical Investigation of a Fluidic Volume Flow Meter", by M. P. Wilson, Jr. Transactions of the ASME, Jour. of Basic Engineering.
"The Effect of Geometric Changes Upon the Switching Point in a Model Bi-stable Fluid Amplifier", by H. F. Hrubecky et al., Proc. Fluid Amplification Symposium, May 1964, pp. 341-350.
"The Response of a Bi-stable Fluid Amplifier to a Step Input", by S. Katz et al., Fluid Amplification Symposium, May 1964, pp. 321-339.
"A Unified Approach to Hydrodynamic Oscillator Type Flowmeters", by H. Yamasaki et al., pp. 191-198.

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