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Title: Apparatus for monitoring two-phase flow

Abstract

A method and apparatus for monitoring two-phase flow is provided that is particularly related to the monitoring of transient two-phase (liquid-vapor) flow rates such as may occur during a pressurized water reactor core blow-down. The present invention essentially comprises the use of flanged wire screens or similar devices, such as perforated plates, to produce certain desirable effects in the flow regime for monitoring purposes. One desirable effect is a measurable and reproducible pressure drop across the screen. The pressure drop can be characterized for various known flow rates and then used to monitor nonhomogeneous flow regimes. Another useful effect of the use of screens or plates in nonhomogeneous flow is that such apparatus tends to create a uniformly dispersed flow regime in the immediate downstream vicinity. This is a desirable effect because it usually increases the accuracy of flow rate measurements determined by conventional methods.

Inventors:
 [1];  [2]
  1. Oak Ridge, TN
  2. Gaithersburg, MD
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
OSTI Identifier:
862771
Patent Number(s):
4009614
Assignee:
United States of America as represented by United States Energy (Washington, DC)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01F - MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
apparatus; monitoring; two-phase; flow; method; provided; particularly; related; transient; liquid-vapor; rates; occur; pressurized; water; reactor; core; blow-down; essentially; comprises; flanged; wire; screens; similar; devices; perforated; plates; produce; desirable; effects; regime; purposes; effect; measurable; reproducible; pressure; drop; screen; characterized; various; monitor; nonhomogeneous; regimes; useful; tends; create; uniformly; dispersed; immediate; downstream; vicinity; increases; accuracy; rate; measurements; determined; conventional; methods; flow regime; two-phase flow; water reactor; pressurized water; conventional methods; flow rates; pressure drop; flow rate; reactor core; uniformly dispersed; phase flow; perforated plates; monitoring two-phase; essentially comprises; wire screen; wire screens; uniformly disperse; perforated plate; rate measurements; similar device; /73/

Citation Formats

Sheppard, John D, and Tong, Long S. Apparatus for monitoring two-phase flow. United States: N. p., 1977. Web.
Sheppard, John D, & Tong, Long S. Apparatus for monitoring two-phase flow. United States.
Sheppard, John D, and Tong, Long S. Tue . "Apparatus for monitoring two-phase flow". United States. https://www.osti.gov/servlets/purl/862771.
@article{osti_862771,
title = {Apparatus for monitoring two-phase flow},
author = {Sheppard, John D and Tong, Long S},
abstractNote = {A method and apparatus for monitoring two-phase flow is provided that is particularly related to the monitoring of transient two-phase (liquid-vapor) flow rates such as may occur during a pressurized water reactor core blow-down. The present invention essentially comprises the use of flanged wire screens or similar devices, such as perforated plates, to produce certain desirable effects in the flow regime for monitoring purposes. One desirable effect is a measurable and reproducible pressure drop across the screen. The pressure drop can be characterized for various known flow rates and then used to monitor nonhomogeneous flow regimes. Another useful effect of the use of screens or plates in nonhomogeneous flow is that such apparatus tends to create a uniformly dispersed flow regime in the immediate downstream vicinity. This is a desirable effect because it usually increases the accuracy of flow rate measurements determined by conventional methods.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1977},
month = {3}
}

Patent:

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