Conference Proceedings Paper
ASSESSMENT OF NON-DIMENSIONAL PARAMETERS FOR STATIC INSTABILITY IN SUPERCRITICAL DOWN-FLOW CHANNELS
The 5th International Symposium on SuperCritical Water-cooled Reactors - 2011 March 13-16
Shahab Yeylaghi (University of Manitoba)
Vijay Chatoorgoon (University of Manitoba)
Laurence Leung (Atomic Energy of Canada Limited)
An analytical study of static instability of supercritical down-flow is presented herein. The study was conducted as part of an ongoing study to help identify relevant non-dimensional parameters governing supercritical flow instability in parallel channels. By and large, static instability was uncovered to be the dominant mode in down-flow, but oscillatory instability was found possible. Results are presented for H2O and CO2. It was found that often the static instability boundary occurred when the channel outlet temperature was close to the pseudo-critical temperature, sometimes even less than the pseudo-critical temperature. The study also indicates what parameters need to be altered, and in which direction, to improve system stability. Three different pressures for water were examined and non-dimensional parameters were assessed and discussed.
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