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

Patent · Tue Aug 04 00:00:00 EDT 1981

OSTI ID:5894842

Dunn, P F

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.

• Assignee: Department of Energy
• Patent Number(s): US 4282481
• Application Number: TRN: 82-001826
• OSTI ID: 5894842
• Resource Relation: Patent File Date: Filed date 17 Jul 1979
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
47 OTHER INSTRUMENTATION
TWO-PHASE FLOW
VOID FRACTION
ELECTRIC MEASURING INSTRUMENTS
BUBBLES
DISTRIBUTION
GASES
LIQUID FLOW
PROBES
SIGNALS
SIZE
ELECTRICAL EQUIPMENT
EQUIPMENT
FLUID FLOW
FLUIDS
MEASURING INSTRUMENTS
420400* - Engineering- Heat Transfer & Fluid Flow
440300 - Miscellaneous Instruments- (-1989)