F11 - Fans & blowers

Organizers : F. Ravelet & T. Shigemitsu

Florent Ravelet is working as an Associate Professor at Arts et Metiers ParisTech (ENSAM, France), teaching turbomachinery and industrial multiphase flows. His present research at Laboratoire DynFluid (ENSAM) is dedicated to the design and study of subsonic counter-rotating fans and pumps.

Toru Shigemitsu is working as an Associate Professor at Tokushima University in Japan, teaching fluid dynamics and turbomachinery. His present research at Tokushima University is dedicated to the performance improvement and the clarification of internal flow for small sized turbomachinery i.e. cooling fans, mini pumps and small hydro-turbines.


The fans and blowers are used in various industrial domains, from aeronautics to household applications. Their use, but also their manufacturing process, represents a significant energy consumtion. The design of fans and blowers has evolved to get higher efficiencies, lower noise and extended ranges of efficient use, together with the increasing use of inverters and drive controllers. The different parameters are becoming more numerous (skew/sweep, tandem machines, counter-rotating machines, ...). The interactions of these machines with their environment (for instance the heat exchanger in an automotive cooling fan system) and their influence on the performance and noise generation are more and more a constraint that has to be taken into account from the very conception. The characterization of their transient behavior is also a key parameter for system modeling.
The Fans and Blowers Forum of the ISROMAC16 Conference is aimed at making a point on recent advances in design and characterization of fans and blowers, which includes: (1) The various design methods and their coupling with optimization algorithms; (2) experimental and CFD studies dedicated to the characterization of unsteady and off-design behaviours; (3) Passive or active control (blowing/suction, actuators and deformable materials.

Non-exhaustive list of suggested Topics:

- Fan design for improved efficiency

- System effect

- Optimization techniques

- Surge, stall and transients

- Rotor-stator interactions and multi-row effects

- Vibration, forced response, flutter and aero-elasticity

- Control