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Title: Apparatus for measuring the local void fraction in a flowing liquid containing a gas

Abstract

The local void fraction in liquid containing a gas is measured by placing an impedance-variation probe in the liquid, applying a controlled voltage or current to the probe, and measuring the probe current or voltage. A circuit for applying the one electrical parameter and measuring the other includes a feedback amplifier that minimizes the effect of probe capacitance and a digitizer to provide a clean signal. Time integration of the signal provides a measure of the void fraction, and an oscilloscope display also shows bubble size and distribution.

Inventors:
 [1]
  1. (Downers Grove, IL)
Issue Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL
OSTI Identifier:
863947
Patent Number(s):
4282481
Assignee:
United States of America as represented by United States (Washington, DC) ANL
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
apparatus; measuring; local; void; fraction; flowing; liquid; containing; gas; measured; placing; impedance-variation; probe; applying; controlled; voltage; current; circuit; electrical; parameter; feedback; amplifier; minimizes; effect; capacitance; digitizer; provide; clean; signal; time; integration; provides; measure; oscilloscope; display; bubble; size; distribution; void fraction; liquid containing; flowing liquid; electrical parameter; time integration; controlled voltage; signal provide; local void; /324/

Citation Formats

Dunn, Patrick F. Apparatus for measuring the local void fraction in a flowing liquid containing a gas. United States: N. p., 1981. Web.
Dunn, Patrick F. Apparatus for measuring the local void fraction in a flowing liquid containing a gas. United States.
Dunn, Patrick F. Thu . "Apparatus for measuring the local void fraction in a flowing liquid containing a gas". United States. https://www.osti.gov/servlets/purl/863947.
@article{osti_863947,
title = {Apparatus for measuring the local void fraction in a flowing liquid containing a gas},
author = {Dunn, Patrick F.},
abstractNote = {The local void fraction in liquid containing a gas is measured by placing an impedance-variation probe in the liquid, applying a controlled voltage or current to the probe, and measuring the probe current or voltage. A circuit for applying the one electrical parameter and measuring the other includes a feedback amplifier that minimizes the effect of probe capacitance and a digitizer to provide a clean signal. Time integration of the signal provides a measure of the void fraction, and an oscilloscope display also shows bubble size and distribution.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1981},
month = {1}
}

Patent:

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