Method and apparatus for probing relative volume fractions
Abstract
A relative volume fraction probe particularly for use in a multiphase fluid system includes two parallel conductive paths defining therebetween a sample zone within the system. A generating unit generates time varying electrical signals which are inserted into one of the two parallel conductive paths. A time domain reflectometer receives the time varying electrical signals returned by the second of the two parallel conductive paths and, responsive thereto, outputs a curve of impedance versus distance. An analysis unit then calculates the area under the curve, subtracts the calculated area from an area produced when the sample zone consists entirely of material of a first fluid phase, and divides this calculated difference by the difference between an area produced when the sample zone consists entirely of material of the first fluid phase and an area produced when the sample zone consists entirely of material of a second fluid phase. The result is the volume fraction.
 Inventors:

 Pittsburgh, PA
 Upper St. Clair, PA
 Issue Date:
 Research Org.:
 Westinghouse Electric Corp., Pittsburgh, PA (United States)
 OSTI Identifier:
 871421
 Patent Number(s):
 5729123
 Assignee:
 United States of America as represented by United States (Washington, DC)
 Patent Classifications (CPCs):

G  PHYSICS G01  MEASURING G01N  INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
 DOE Contract Number:
 AC1189PN38014
 Resource Type:
 Patent
 Country of Publication:
 United States
 Language:
 English
 Subject:
 method; apparatus; probing; relative; volume; fractions; fraction; probe; particularly; multiphase; fluid; parallel; conductive; paths; defining; therebetween; sample; zone; generating; unit; generates; time; varying; electrical; signals; inserted; domain; reflectometer; receives; returned; responsive; thereto; outputs; curve; impedance; versus; distance; analysis; calculates; subtracts; calculated; produced; consists; entirely; material; phase; divides; difference; result; volume fraction; analysis unit; time varying; fluid phase; electrical signals; electrical signal; conductive path; time domain; phase fluid; relative volume; parallel conductive; generating unit; conductive paths; domain reflectometer; defining therebetween; /324/73/
Citation Formats
Jandrasits, Walter G, and Kikta, Thomas J. Method and apparatus for probing relative volume fractions. United States: N. p., 1998.
Web.
Jandrasits, Walter G, & Kikta, Thomas J. Method and apparatus for probing relative volume fractions. United States.
Jandrasits, Walter G, and Kikta, Thomas J. Thu .
"Method and apparatus for probing relative volume fractions". United States. https://www.osti.gov/servlets/purl/871421.
@article{osti_871421,
title = {Method and apparatus for probing relative volume fractions},
author = {Jandrasits, Walter G and Kikta, Thomas J},
abstractNote = {A relative volume fraction probe particularly for use in a multiphase fluid system includes two parallel conductive paths defining therebetween a sample zone within the system. A generating unit generates time varying electrical signals which are inserted into one of the two parallel conductive paths. A time domain reflectometer receives the time varying electrical signals returned by the second of the two parallel conductive paths and, responsive thereto, outputs a curve of impedance versus distance. An analysis unit then calculates the area under the curve, subtracts the calculated area from an area produced when the sample zone consists entirely of material of a first fluid phase, and divides this calculated difference by the difference between an area produced when the sample zone consists entirely of material of the first fluid phase and an area produced when the sample zone consists entirely of material of a second fluid phase. The result is the volume fraction.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {1}
}