Analytical investigation on rod bundle CHF-regime criterion based on dimensionless groups

Liu, Wei; Peng, Shinian; Jiang, Guangming; Yu, Liang

doi:10.1016/j.ijthermalsci.2020.106571

Cited by 4 publications

(3 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In order to correctly distinguish the rod bundle CHF regimes, a general dimensionless rod bundle CHF correlation is obtained based on the dimensional analysis method (Liu et al, 2021a). The real vapor quality, Katto number, and boiling length are introduced to establish the basic form of the dimensionless CHF correlation.…”

Section: Rod Bundle Chf-regime Criterionmentioning

confidence: 99%

“…The radial net two-phase mass exchange rate from the bulk flow to the superheated liquid layer caused by turbulent velocity fluctuations (Liu et al, 2021b) is determined as FIGURE 2 | Dimensionless rod bundle CHF-regime map (Liu et al, 2021a).…”

Section: Dnb Regime Chf Mechanistic Modelmentioning

confidence: 99%

“…In previous studies, the author has obtained the classification criterion for CHF conditions in the rod bundle channel with the dimensional analysis method (Liu et al, 2021a) and developed the DNB regime CHF mechanistic model of superheated liquid layer depletion under turbulence fluctuation bubbles (Liu et al, 2021b). In this study, a comprehensive CHF mechanistic model covering different regimes of CHF prediction will be established by using the existing research results and the mature DO regime CHF mechanistic model.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Investigation on Rod Bundle CHF Mechanistic Model for DNB and DO Prediction Under Wide Parameter Range

et al. 2021

Self Cite

View full text Add to dashboard Cite

For a water cooled reactor, the key thermal-hydraulic parameters span a wide range corresponding to different CHF regimes. Under accident conditions, due to the flow regime transition and interchannel mixing effect, the corresponding CHF can transition from the DO to DNB regime. In order to continuously and accurately predict DNB and DO regime CHF under wide parameter range for rod bundle channel, a comprehensive CHF mechanistic model covering the DNB and DO regime CHF prediction is established based on the rod bundle CHF-regime criterion. The DNB regime CHF mechanistic model of superheated liquid layer depletion under turbulence fluctuation bubbles and the mature DO regime CHF mechanistic model are combined to form the comprehensive CHF model. Furthermore, the comprehensive CHF model is assessed by 5 × 5 rod bundle CHF experimental data independently obtained by the Nuclear Power Institute of China (NPIC). The statistical evaluation and parametric trend analysis show that the maximum mean error of P/M is within ±22%, and the local pressure, mass flux, and quality do not have any effects on the average deviations of the predicted flux P from the measured flux M. This indicates that the comprehensive CHF mechanistic model can accurately and continuously predict the DNB and DO regime CHF in the rod bundle channel.

show abstract

Section: Rod Bundle Chf-regime Criterionmentioning

confidence: 99%

Section: Dnb Regime Chf Mechanistic Modelmentioning

confidence: 99%