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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:
Issue Date:
OSTI Identifier:
6763741
Assignee:
Dept. of Energy
DOE Contract Number:  
W-31-109-ENG-38
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; TWO-PHASE FLOW; VOID FRACTION; MEASURING INSTRUMENTS; DESIGN; OSCILLOGRAPHS; ELECTRONIC EQUIPMENT; EQUIPMENT; FLUID FLOW; 420400* - Engineering- Heat Transfer & Fluid Flow

Citation Formats

Dunn, P F. Apparatus for measuring the local void fraction in a flowing liquid containing a gas. United States: N. p., 1979. Web.
Dunn, P F. Apparatus for measuring the local void fraction in a flowing liquid containing a gas. United States.
Dunn, P F. Tue . "Apparatus for measuring the local void fraction in a flowing liquid containing a gas". United States.
@article{osti_6763741,
title = {Apparatus for measuring the local void fraction in a flowing liquid containing a gas},
author = {Dunn, P 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 = {1979},
month = {7}
}