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Title: Two phase pressure drop across abrupt area changes in oscillatory flow

Abstract

The ability of one-dimensional momentum balances to predict behavior during two-phase oscillatory flow has been examined. Flow oscillations in a Freon-Freon vapor system were induced by cycling a three-way valve so as to divert a varying portion of the total flow from the test section. The data taken included the phase shift between pressure and flow curves and the head fluctuation to flow fluctuation ratio. These data were compared to theoretical predictions. For void fractions below about 0.55, reasonable agreement between predictions and observations was obtained. At the highest void fractions examined, agreement between prediction and measurement was poor. However, at these high void fractions measurement errors may have been very substantial. Further, the simplifying assumptions required by the numerical calculation procedure chosen could no longer be considered valid. No real conclusion could therefore be drawn from the data at high voids. (auth)

Authors:
; ;
Publication Date:
Research Org.:
Cincinnati Univ., Ohio (USA)
OSTI Identifier:
4134036
Report Number(s):
COO-2152-18
NSA Number:
NSA-33-008750
Resource Type:
Technical Report
Resource Relation:
Other Information: Orig. Receipt Date: 30-JUN-76
Country of Publication:
United States
Language:
English
Subject:
N77900* -Reactors-Reactor Safety &; Environmental Aspects; N77100 -Reactors-Power Reactors, Non-breeding, Light-water Moderated, Boiling Water-cooled; N77200 -Reactors-Power Reactors, Non-breeding, Light-water Moderated, Non-boiling Water-cooled; 220900* -Nuclear Reactor Technology-Reactor Safety; *BWR TYPE REACTORS- LOSS OF COOLANT; *LOSS OF COOLANT- TWO-PHASE FLOW; *PRIMARY COOLANT CIRCUITS- TWO-PHASE FLOW; *PWR TYPE REACTORS- LOSS OF COOLANT; CONFIGURATION; HYDRAULICS; PRESSURE DROP; SIMULATION

Citation Formats

Weisman, J., Ake, T., and Knott, R. Two phase pressure drop across abrupt area changes in oscillatory flow. United States: N. p., 1975. Web. doi:10.2172/4134036.
Weisman, J., Ake, T., & Knott, R. Two phase pressure drop across abrupt area changes in oscillatory flow. United States. doi:10.2172/4134036.
Weisman, J., Ake, T., and Knott, R. Thu . "Two phase pressure drop across abrupt area changes in oscillatory flow". United States. doi:10.2172/4134036. https://www.osti.gov/servlets/purl/4134036.
@article{osti_4134036,
title = {Two phase pressure drop across abrupt area changes in oscillatory flow},
author = {Weisman, J. and Ake, T. and Knott, R.},
abstractNote = {The ability of one-dimensional momentum balances to predict behavior during two-phase oscillatory flow has been examined. Flow oscillations in a Freon-Freon vapor system were induced by cycling a three-way valve so as to divert a varying portion of the total flow from the test section. The data taken included the phase shift between pressure and flow curves and the head fluctuation to flow fluctuation ratio. These data were compared to theoretical predictions. For void fractions below about 0.55, reasonable agreement between predictions and observations was obtained. At the highest void fractions examined, agreement between prediction and measurement was poor. However, at these high void fractions measurement errors may have been very substantial. Further, the simplifying assumptions required by the numerical calculation procedure chosen could no longer be considered valid. No real conclusion could therefore be drawn from the data at high voids. (auth)},
doi = {10.2172/4134036},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu May 01 00:00:00 EDT 1975},
month = {Thu May 01 00:00:00 EDT 1975}
}

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