This study was carried out to demonstrate the effects and determine the changes caused by a swirling flow of wet steam through a supersonic nozzle, with emphasis towards the condensation efficiency of wet steam at the nozzle exit. Various 2D nozzle designs were studied to find the best model to be used in this study. Multiple simulations were created using computational fluid dynamics and parameters were assigned to manage constraints and variables. A benchmarking process was then carried out in order to ascertain the truthfulness of the design. The results obtained were analysed and measured against pre-defined results to determine its legitimacy. The chosen convergent - divergent nozzle with verified geometry was subsequently modelled in 3D. Wet steam is simulated to flow normally through the convergent - divergent nozzle. Swirl is then introduced to the flow of wet steam by means of an angled inlet. Various wet steam flow parameters were measured at the inlet and outlet of the Laval nozzle. It was observed that liquid mass fraction, droplet average radius and droplets per unit volume are the main parameters which changes when swirl intensity was varied. © 2018 Author(s).