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

Patent · Thu Jan 01 00:00:00 EST 1981

OSTI ID:863947

Dunn, Patrick F ^[1]

---

1. Downers Grove, IL

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.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL (United States)
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4282481
• OSTI ID: 863947
• Country of Publication: United States
• Language: English

Related Subjects

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/