University of Florence, is a large entity with 13 faculties and 74 departments. Dipartimento di Energetica 'Sergio Stecco' - DE consists of seven branches and it carries out research in a wide range of engineering applications. The Heat Transfer and Combustion Group (HTC Group) is a research unit within the DE. Research activities in the field of turbomachinery heat transfer are divided in experimental and numerical tasks. Test facilities consist of two suction type wind tunnels. Both test beds are able to study scaled models of cooling systems using TLC technique coupled with standard aerodynamic measurements, PIV and acoustics analysis.