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

Patent · 17 July 1979

OSTI ID:6763741

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.

• DOE Contract Number: W-31109-ENG-38
• Assignee: Dept. of Energy
• Patent Number(s): None
• OSTI ID: 6763741
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
DESIGN
ELECTRONIC EQUIPMENT
EQUIPMENT
FLUID FLOW
MEASURING INSTRUMENTS
OSCILLOGRAPHS
TWO-PHASE FLOW
VOID FRACTION