Flow Characteristics of Confined G-CO₂ and S-CO₂ Jets

In this present work, a high-speed supercritical carbon dioxide jet emanates from chevron nozzle is computationally investigated. The primary objective of this work is to investigate the mixing nature of the jet with the chamber at supercritical and gaseous conditions at a different phase. This present study was performed using commercial computational fluid dynamics software Fluent V18.2. The mixing characteristics were analyzed with turbulent characteristics like turbulent kinetic energy and turbulent dissipation rate. It is found that flow characteristics of supercritical CO₂ differ from the gaseous carbon dioxide. The results indicate that the chevron nozzle substantially increases the mixing characteristics of supercritical CO₂. The influence of chamber diameter and length on the mass entrainment and jet mixing characteristics are also investigated.