Modelling
Analysis and
Research in
Turbomachinery and
Energy
Systems
Research on fans started in the mid-nineties with the design and the realisation of three test rigs for fan testing (two for axial fans and one for cross-flow fans) built in agreement to the International Standard ISO5801. The extensive experimental activity performed on both commercial and new fan configurations allowed to study the effect of the main design parameters on fan performance and define design criteria to achieve the best conversion efficiency. More recently, experimental research has been supported by multi-dimensional modelling, able to provide details of flow field that cannot be easily revealed by measurements. The numerical study of new designs has been possible thanks to the availability of extended databases that permit a strong validation of the computational results. The twenty-year research activity has been carried out in collaboration with the major manufacturing companies of the Northern Italy such as Ferrari Ventilatori Industriali Spa, Galletti Spa, Mistral srl, Vortice Elettrosociali Spa.
Last studies on axial fans focus on...
Hundreds of combinations of cross flow fan impellers and casings were tested during about ten years of experimental analyses (1995-2005). The activity was aimed at creating an extended database to formulate an original criterion of parametrization of the fan geometry and improve fan performance according to different objectives (multi-objective optimization): maximum pressure, maximum flow rate and maximum efficiency. The research activity resumed in 2014 to investigate the impact of suction design on fan performance. Test results are included in the publication presented at FAN2015 International Conference.
Axial fans
AXIAL AND CROSS-FLOW FANS

a) Effect of the height of vortex wall position on performance of a small fan
b) CFD simulation of the flow field through the rotor
a) In-house designed axial fan rotor assembled to be tested in the fan laboratory
Cross-flow fans
b) CFD simulation of the flow field through the rotor of a commercial fan