Experimental Investigation on Density Wave Instability of Sodium Boiling Two-Phase Flow in an Annulus

Conference · Mon Jul 01 04:00:00 EDT 2002

OSTI ID:21072843

Qiu, Suizheng; Jia, Dounan ^[1]; Takahashi, Minoru ^[2]

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1. Xi'an Jiaotong University, No.28, Xianning West Road, Xi'an, Shaanxi, 710049 (China)
2. Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152 (Japan)

Experiments of density wave instability in a liquid sodium boiling two-phase flow experiments in an annulus were carried out in the following parameters range: heat flux from 80 kW/m{sup 2} to 976 kW/m{sup 2}, inlet subcooling from 25.6 deg. C to 226.8 deg. C, mass flow rate from 7.92 kg/h to 68.9 kg/h, system pressure from 2600 Pa to 0.12 Mpa. Not only the mechanism of the instability, critical conditions and oscillation period, but also the effects of pressure, mass flow rate and inlet subcooling on the density wave instability were explored experimentally and theoretically. From the experimental data, it was found that the lower the inlet temperature was, the higher the system pressure and the mass flow rate that could result in a more stable boiling two-phase flow were. A correlation for the density wave instability was obtained on from the dimensional analysis for the conservation equations of mass, momentum and energy. (authors)

• Research Organization: The ASME Foundation, Inc., Three Park Avenue, New York, NY 10016-5990 (United States)
• OSTI ID: 21072843
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
BOILING
CORRELATIONS
DENSITY
EQUATIONS
FLOW RATE
HEAT FLUX
INSTABILITY
LIQUIDS
SODIUM
SUBCOOLING
TWO-PHASE FLOW