Abstract
Instability of a boiling natural circulation loop with a chimney at low pressure and low heater power was investigated by linear stability analysis and experiment. A homogeneous and thermodynamic equilibrium model for two-phase flow was used. The effect of flashing induced by pressure drop in the heated channels and the chimney was considered. The effects of coupling between two boiling channels were investigated. It was found that in-phase-mode instability was apt to occur when channel inlet subcooling was large and boiling began in the chimney. In-phase-mode instability easily occurred when channel length became short and the chimney became long. Out-of-phase-mode instability was apt to occur when chimney length became small and boiling began in the channel. It was suggested that in-phase-mode instability was density weve oscillation induced by flashing in the chimney and out-of-phase-mode instability was density wave oscillation induced by boiling in the channels. The analytical results agreed qualitatively with experimental results.
| Original language | English |
|---|---|
| Pages (from-to) | 4067-4073 |
| Number of pages | 7 |
| Journal | Transactions of the Japan Society of Mechanical Engineers Series B |
| Volume | 61 |
| Issue number | 591 |
| DOIs | |
| Publication status | Published - 1995 Jan 1 |
| Externally published | Yes |
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Keywords
- Boiler
- Boiling
- Density Wave Oscillation
- Flashing
- Heat Exchanger
- Linear Stability Analysis
- Multiphase Flow
- Natural Circulation
- Nuclear Reactor
- Stability
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanical Engineering
Cite this
Thermohydraulic instability of boiling natural circulation loop with a chimeny. 1st report, linear stability analysis using homogenous two-phase flow model and experiment on thermohydraulic instability induced by flashing. / Inada, Fumio; Furuya, Masahiro; Yasuo, Akira.
In: Transactions of the Japan Society of Mechanical Engineers Series B, Vol. 61, No. 591, 01.01.1995, p. 4067-4073.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Thermohydraulic instability of boiling natural circulation loop with a chimeny. 1st report, linear stability analysis using homogenous two-phase flow model and experiment on thermohydraulic instability induced by flashing
AU - Inada, Fumio
AU - Furuya, Masahiro
AU - Yasuo, Akira
PY - 1995/1/1
Y1 - 1995/1/1
N2 - Instability of a boiling natural circulation loop with a chimney at low pressure and low heater power was investigated by linear stability analysis and experiment. A homogeneous and thermodynamic equilibrium model for two-phase flow was used. The effect of flashing induced by pressure drop in the heated channels and the chimney was considered. The effects of coupling between two boiling channels were investigated. It was found that in-phase-mode instability was apt to occur when channel inlet subcooling was large and boiling began in the chimney. In-phase-mode instability easily occurred when channel length became short and the chimney became long. Out-of-phase-mode instability was apt to occur when chimney length became small and boiling began in the channel. It was suggested that in-phase-mode instability was density weve oscillation induced by flashing in the chimney and out-of-phase-mode instability was density wave oscillation induced by boiling in the channels. The analytical results agreed qualitatively with experimental results.
AB - Instability of a boiling natural circulation loop with a chimney at low pressure and low heater power was investigated by linear stability analysis and experiment. A homogeneous and thermodynamic equilibrium model for two-phase flow was used. The effect of flashing induced by pressure drop in the heated channels and the chimney was considered. The effects of coupling between two boiling channels were investigated. It was found that in-phase-mode instability was apt to occur when channel inlet subcooling was large and boiling began in the chimney. In-phase-mode instability easily occurred when channel length became short and the chimney became long. Out-of-phase-mode instability was apt to occur when chimney length became small and boiling began in the channel. It was suggested that in-phase-mode instability was density weve oscillation induced by flashing in the chimney and out-of-phase-mode instability was density wave oscillation induced by boiling in the channels. The analytical results agreed qualitatively with experimental results.
KW - Boiler
KW - Boiling
KW - Density Wave Oscillation
KW - Flashing
KW - Heat Exchanger
KW - Linear Stability Analysis
KW - Multiphase Flow
KW - Natural Circulation
KW - Nuclear Reactor
KW - Stability
UR - http://www.scopus.com/inward/record.url?scp=0029408084&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0029408084&partnerID=8YFLogxK
U2 - 10.1299/kikaib.61.4067
DO - 10.1299/kikaib.61.4067
M3 - Article
AN - SCOPUS:0029408084
VL - 61
SP - 4067
EP - 4073
JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
SN - 0387-5016
IS - 591
ER -