Published May 1978 | Version v1
Report Restricted

Air--water countercurrent annular flow in vertical tubes. Interim report

Creators

Description

Air--water countercurrent flow characteristics in 2.5 and 5.1 cm vertical tubes are investigated. Experimental measurements include air and water flow rates, pressure losses, pressure gradients, and liquid fractions. Tube-end geometries are altered to study their influence on the flow characteristics. Liquid-fraction measurements indicate that the countercurrent flow may be divided into three regions based upon the relative magnitudes of interfacial and wall shear stresses. The dependence of interfacial friction factor on the liquid fraction is isolated. The mechanism limiting countercurrent flows within a tube is modelled by a simple theory. Salient features of the theory are demonstrated. Comparisons between the theory and some experimental data are presented

Availability note (English)

MF available from INIS under the Report Number; Available from NTIS., PC A04/MF A01.

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Additional details

Additional titles

Augmented title (English)
BWR;PWR

Publishing Information

Imprint Pagination
61 p.
Report number
EPRI-NP--786

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
10437257
Subject category
S61: RADIATION PROTECTION AND DOSIMETRY; S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
Descriptors DEI
AIR; BWR TYPE REACTORS; CORE FLOODING SYSTEMS; CORE SPRAY SYSTEMS; FLOW RATE; PRESSURE DROP; PWR TYPE REACTORS; TWO-PHASE FLOW; WATER
Descriptors DEC
ECCS; FLUID FLOW; FLUIDS; GASES; HYDROGEN COMPOUNDS; OXYGEN COMPOUNDS; REACTOR PROTECTION SYSTEMS; REACTORS; WATER COOLED REACTORS; WATER MODERATED REACTORS