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Session: Simulation and design tools: CFD
Session starts: Tuesday 08 October, 10:00
Presentation starts: 10:40
Room: Van Weelde Zaal

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Benjamin Monje (University of Seville)
David Sánchez (University of Seville)
Mark Savill (Cranfield University)
Pericles Pilidis (Cranfield University)
Tomás Sánchez (University of Seville)

Abstract:
With the aim of creating an integral package for supercritical CO2 (S-CO2) centrifugal compressor design, the authors have developed a 1D tool fed with basic design parameters obtained from cycle calculations. This tool has been validated both for air and S-CO2 compressor performance, showing satisfactory agreement with published experimental results, and also combined with a simple optimisation algorithm to produce as efficient a compressor design as possible. This design has then been checked with a 3D CFD tool, at a second stage of the design process, where the following problems have been identified: (i) there is a lower than 5% difference between the 1D and 3D estimated performance of the compressor if tip and friction losses are neglected in the fully 3D analysis aiming for a low computational time; (ii) condensation of carbon dioxide is likely to take place in regions of local acceleration of the fluid, bringing about a need for a more complex simulation of the fluid properties and flow behaviour (multiphase flow).