F9 - Components interaction
in Turbomachinery

Organizers: R. Pacciani & M. Marconcini

Roberto Pacciani is Associate Professor at the Department of Industrial Engineering of the University of Florence. His research involves the development of Computational Fluid Dynamics methodologies with a special focus on turbomachinery design and analysis, and particular emphasys on turbulence/transition modelling and unsteady component interactions. Applications mainly concern the advanced aerodynamic design of aeronautical and industrial turbomachinery.

Michele Marconcini is working as an Assistant Professor at Dept. of Industrial Engineering of University of Florence. His current activity mainly concerns the development of steady/unsteady CFD methods and their application to advanced aerodynamic design and analysis of aeronautical and industrial turbomachinery.


Turbomachinery designers have been long since aware that the flow within turbomachinery components is inherently unsteady. Until a few years ago, however, unsteady 3D calculations were too expensive to be contemplated as design tools, and some methods had to be developed for predicting the time average of unsteady flows from steady calculations.
In this regard, it is worth bearing in mind that very efficient machines have been ever since designed using the steady-state assumption. Nonetheless, there are some cases in which unsteady interaction is important and cannot be neglected for reliable performance estimations. In fact, many researchers have long since observed the need for capturing the unsteady aspects in specific fields, such as wake-induced transition in low pressure turbines, for mechanical integrity checks to forced response or blade flutter, or heat transfer issues in case of circumferential non-uniformities.
The forum of the ISROMAC17 Conference is devoted to the discussion of the attempts made in all these fields to unlock the full potential of the available computational power to solve long-standing issues: accurately reproduce the aerodynamic mechanisms affecting performance of all the components in realistic operating conditions to enhance reliability and improve efficiency.

Non-exhaustive list of suggested Topics:

- Rotor-stator interaction in multistage environment

- Interaction with upstream stages: clocking effects

- Inlet distortions, intake/low pressure compressor (LPC)

- Unsteady interaction combustor/turbine, hot streaks migration

- Unsteady interaction fan/high pressure compressor (HPC)

- Unsteady interaction high pressure turbine (HPT)/ low pressure turbine (LPT)