You need JavaScript to view this

Measurements of Burnout Conditions for Flow of Boiling Water in Vertical Round Ducts (Part 2)

Abstract

The hydrodynamic stability and the burnout conditions for flow of boiling water have been studied in a natural circulation loop in the pressure range from 10 to 70 atg. The test section was a round, duct of 20 mm inner diameter and 4890 mm heated length. The experimental results showed that within the ranges tested the stability of the flow increases with increasing pressure, increasing throttling before the test section, but decreases with increasing inlet sub-cooling and increasing throttling after the test section. The measured thresholds of instability compared well with the analytical results by Jahnberg. For an inlet sub-cooling temperature of about 2 deg C the measured burnout steam qualities were low by a factor of about 1.3 compared to forced circulation data obtained with the same test section. At higher sub-cooling temperatures the discrepancy between forced and natural circulation data increased, so that at {delta}t{sub sub} = 16 deg C, the natural circulation data were low by a factor of about 2.5. However, by applying inlet throttling of the flow the burnout values approached and finally coincided with the forced circulation data.
Publication Date:
Jan 15, 1964
Product Type:
Technical Report
Report Number:
AE-131
Resource Relation:
Other Information: 13 refs., 20 figs., 1 tab.
Subject:
42 ENGINEERING; TWO-PHASE FLOW; ACCURACY; PRESSURE DEPENDENCE; STEAM QUALITY; FLOW RATE; FLUID FLOW; DUCTS; BURNOUT
OSTI ID:
20930938
Research Organizations:
AB Atomenergi, Nykoeping (Sweden)
Country of Origin:
Sweden
Language:
English
Other Identifying Numbers:
TRN: SE0708350
Availability:
Commercial reproduction prohibited; OSTI as DE20930938
Submitting Site:
SWDN
Size:
42 pages
Announcement Date:
Sep 29, 2007

Citation Formats

Becker, Kurt M, Mathisen, R P, Eklind, O, and Norman, B. Measurements of Burnout Conditions for Flow of Boiling Water in Vertical Round Ducts (Part 2). Sweden: N. p., 1964. Web.
Becker, Kurt M, Mathisen, R P, Eklind, O, & Norman, B. Measurements of Burnout Conditions for Flow of Boiling Water in Vertical Round Ducts (Part 2). Sweden.
Becker, Kurt M, Mathisen, R P, Eklind, O, and Norman, B. 1964. "Measurements of Burnout Conditions for Flow of Boiling Water in Vertical Round Ducts (Part 2)." Sweden.
@misc{etde_20930938,
title = {Measurements of Burnout Conditions for Flow of Boiling Water in Vertical Round Ducts (Part 2)}
author = {Becker, Kurt M, Mathisen, R P, Eklind, O, and Norman, B}
abstractNote = {The hydrodynamic stability and the burnout conditions for flow of boiling water have been studied in a natural circulation loop in the pressure range from 10 to 70 atg. The test section was a round, duct of 20 mm inner diameter and 4890 mm heated length. The experimental results showed that within the ranges tested the stability of the flow increases with increasing pressure, increasing throttling before the test section, but decreases with increasing inlet sub-cooling and increasing throttling after the test section. The measured thresholds of instability compared well with the analytical results by Jahnberg. For an inlet sub-cooling temperature of about 2 deg C the measured burnout steam qualities were low by a factor of about 1.3 compared to forced circulation data obtained with the same test section. At higher sub-cooling temperatures the discrepancy between forced and natural circulation data increased, so that at {delta}t{sub sub} = 16 deg C, the natural circulation data were low by a factor of about 2.5. However, by applying inlet throttling of the flow the burnout values approached and finally coincided with the forced circulation data.}
place = {Sweden}
year = {1964}
month = {Jan}
}