The paper proposes dimensionless parameters for the analysis of stability in heated channels with supercritical fluids. The parameters are devised basing on the classical phase change and subcooling numbers adopted in the case of boiling channels, proposing a novel formulation making use of fluid properties at the pseudo-critical temperature as a function of pressure. The adopted formulation for dimensionless density of a given fluid provides a unique dependence with respect to dimensionless enthalpy, in a reasonably wide range of system pressures, thus giving generality to the predictions of unstable conditions obtained as a function of dimensionless parameters. It is shown that these parameters allow setting up quantitative stability maps for a single heated channel with imposed overall pressure drop, in analogy with the ones proposed in previous work concerning boiling channels. Similarities with the boiling channel stability phenomena are pointed out, also supporting the conclusions with system code predictions.
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14th International Conference on Nuclear Engineering
July 17–20, 2006
Miami, Florida, USA
Conference Sponsors:
- Nuclear Engineering Division
ISBN:
0-7918-4243-6
PROCEEDINGS PAPER
Dimensionless Parameters in Stability Analysis of Heated Channels With Fluids at Supercritical Pressures
Walter Ambrosini,
Walter Ambrosini
University of Pisa, Pisa, Italy
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Medhat Sharabi
Medhat Sharabi
University of Pisa, Pisa, Italy
Search for other works by this author on:
Walter Ambrosini
University of Pisa, Pisa, Italy
Medhat Sharabi
University of Pisa, Pisa, Italy
Paper No:
ICONE14-89862, pp. 881-888; 8 pages
Published Online:
September 17, 2008
Citation
Ambrosini, W, & Sharabi, M. "Dimensionless Parameters in Stability Analysis of Heated Channels With Fluids at Supercritical Pressures." Proceedings of the 14th International Conference on Nuclear Engineering. Volume 2: Thermal Hydraulics. Miami, Florida, USA. July 17–20, 2006. pp. 881-888. ASME. https://doi.org/10.1115/ICONE14-89862
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