Numerical Investigations Of Deteriorated Heat Transfer Phenomenon For Supercritical Water Flow In Vertical Tubes

Abstract

— The present paper is aimed at the in-depth thermal-hydraulic analysis of supercritical water flow at various operating conditions in vertical circular tubes. A one-dimensional thermal-hydraulic solution algorithm has been used for the analysis in this paper. Nine experimental cases are studied thoroughly and out of these, four cases which are operated at various working regimes are chosen and presented for the detailed analysis of deteriorated heat transfer and normal heat transfer cases. The studies are carried out for the distributions of nondimensional acceleration and buoyancy parameters, and different types of pressure drops along the axial direction and its effect on the heat transfer.