Premium
Natural convection inside heated channel of a facility representing prismatic modular reactor core
Author(s) -
Taha Mahmoud M.,
Said Ibrahim A.,
Usman Shoaib,
AlDahhan Muthanna H.
Publication year - 2018
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.16185
Subject(s) - plenum space , dimensionless quantity , reynolds number , froude number , turbulence , mechanics , natural convection , natural circulation , prandtl number , thermodynamics , physics , chemistry , flow (mathematics) , geometry , heat transfer , mathematics
The newly developed Plenum‐to‐Plenum facility (P2PF) at Missouri S&T has shown to be an innovative separate effects test facility representing the geometry of prismatic modular reactors. Thermal and velocity fields inside this dual channel facility have been investigated under different natural circulation intensities. It is found that temperature and velocity profiles are function of the measurements locations and the amount of heat supplied to the channel. Quantification of the overall Rayleigh numberR aversus overall Reynold numberR eare found to be related by R e α R a 0.58 . Upper plenum mixing was characterized by determining the modified Reynold number ( R e m ) and Froude number ( 1 /F r 2 )dimensionless groups. Analysis of these dimensionless groups along with observable turbulence amplifications emphasize relevance of adopting axial temperature inflection as a criterion for initiation of naturally driven flow destabilization inside vertical heated channels. Additionally, quantification of the distortion factors for characteristic dimensionless groups reveal a good similarity between the P2PF and the Modular High Temperature Gas‐cooled Reactor. © 2018 American Institute of Chemical Engineers AIChE J , 64: 3467–3478, 2018