Provide the basics for the understanding of the operation and of the
aerodynamic design of turbomachineries with particular emphasis on industrial
and aeronautical gas turbines.
Teaching Methods
Lectures with the aid of notes provided by the teacher.
Further information
Visit the official website, access is restricted, ask information to the
teacher: http://arnone.de.unifi.it/tgroup/academics
Type of Assessment
oral examination
Course program
COMPRESSORS:
- basic theory, velocity triangles and energy balance.
- blade topology, cascade flowfield, boundary layer and diffusion.
- Through flow and 3D effects.
- off design conditions
- axial flow compressors blades
- centrifugal compressors blades
- stall and choke
PUMPS:
- details of running characteristic.
- pumps topology (impeller, diffuser and volute).
- cavitation and NPSH.
- pump design and sizing.
TURBINE:
- basic theory.
- cascade flowfield, profile losses, transonic stages.
- Through flow and 3D effects.
- Axial turbine blades.
- Stage analysis.
AEROELASTICITY
- aeroelastic phenomena and their causes, experimental and computational aeroelastic analysis
- inter-blade phase angle and nodal diameters, real and complex modes
- forced vibration design and flutter design
AEROACOUSTICS
- acoustic waves, noise typologies and their sources, acoustic quantities
- duct acoustics, experimental and computational aeroacoustic analysis, cut-on and cut-off waves
- aeroacoustic design and noise reduction techniques
SECONDARY AIR SYSTEM (SAS)
- introduction to the SAS
- basic theory
- SAS design
- numerical analysis of the SAS
- estimation of the ingestion level of a gas turbine stator-rotor system