Notice of Retraction: Three dimensional numerical simulation of flow and heat transfer in a direct transfer preswirl system

The accuracy of computational fluid dynamics (CFD) for the prediction of flow and heat transfer through a comparison of CFD results of three dimension sector models with experimental measurements in a direct transfer preswirl system is investigated. Several turbulence models are tested in two CFD codes. Reasonable quantitative agreement with experimental data for static pressure, total pressure and disc heat transfer is found for the different models, but all models gave results which differ from the experimental data in some respect. The more detailed geometry did not significantly improve the comparison with experiment, particularly in the complex mixing region near the pre-swirl nozzle jets. The predicted heat transfer near the receiver holes was also shown to be sensitive to near-wall turbulence modelling. Overall, the results are encouraging for the careful use of CFD in pre-swirl-system design.