Numerical Investigation on Interphase Interaction and Interplume Effects of Multi-Hole Steam Injection Condensation Based on ADS1-3

Abstract Multi-hole jets are commonly employed in most technical applications for cooling and depressurization of high-temperature and high-pressure steam emissions due to their extraordinarily high heat and mass transfer efficiency. Due to the complexity of the micromechanics of steam condensation, in numerical calculations, existing models do not fully satisfy simulation needs, particularly under porous circumstances, past research has concentrated on single-pore steam jet direct contact condensation (DCC). Based on the ADS 1-3 level equipment in IRWST, the development of a model for DCC of multi-hole vapor injection, a three-dimensional transient numerical simulation research of the DCC mechanism and heat transfer characteristics of a multi-hole high-temperature and high-pressure steam jet is undertaken in this work. The simulation results of the VOF and Mixture multiphase flow models graphically demonstrate the variations in their calculation theories, with the treatment of interphase interpenetration being the most significant difference. Compared to the MIXTURE model, the plume calculated using the VOF model is much larger, with the axial length of the plume being 3 to 4 times that calculated using the MIXTURE model, and the radial length being 2 to 3 times that calculated using the MIXTURE model, which is in gross disagreement with the experimental results. Finally, the Mixture model is better suited for numerical simulations of the steam jet DCC’s non-full Eulerian multiphase flow model. It serves as a data source for future porous steam jet DCC numerical simulation investigations.