Course teached as: B030157 - TURBOMACCHINE Second Cycle Degree in ENERGY ENGINEERING Curriculum ENERGIA
Loss mechanisms in turbomachineries.
Preliminary design of turbomachineries.
Axial and centrifugal compressors.
Aeroelasticity: forced response and flutter.
Noise generation and propagation in turbomachinery applications.
The aim of the course is to 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.
CC2: Tools for modeling energy/mechanical/propulsion systems and their role in supporting the analysis and design of systems and components. Understanding the organization of information in databases and computer design to support processes
CC5: Applied fluid dynamics and machinery: machine components and systems for energy conversion, propulsion and design principles: from the 0D basic approach to CFD for advanced design (optimization).
CA1: Ability of analysis and modeling of mechanical/electrical/propulsive components and systems: basic problems and models for industrial engineering, with special reference to mechanical and energy engineering.
CA2: Ability of applying knowledge in the field of thermofluidodynamic and machinery to solve problems of theoretical and applied thermodynamics, fluid dynamics and heat transfer.
CA4: Implement the thermofluidodynamic design of components, starting from the basic aspects (0D) up to the CFD implementation.
CC1: In-depth knowledge and understanding of the theoretical-scientific aspects of engineering, with a specific reference to mechanical engineering, in which students are able to identify, formulate and solve, even in an innovative way, complex and/or interdisciplinary problems. The ability to understand a multidisciplinary context in the engineering field and to work with a problem solving approach.
CC11: Knowledge and understanding of the machinery sector deepening the aspects properly connected with systems for energy production and transformation, with reference also to renewable energies and/or aspects related to propulsion systems. Understanding the role of different energy technologies in ensuring the environmental and economic sustainability of production.
CA1: Applying knowledge and understanding related to problem identification and formulation of solutions, in the field of mechanical engineering, to set up, design, implement and verify systems and apparatus, even of high functional complexity, taking into account the implications related to environmental, economic and ethical aspects, employing well established methods.
CA2: Applying knowledge and understanding related to the analysis and optimization of mechanical devices and systems, as well as to their innovation also through the development and improvement of design methods, constantly confronting with the rapid evolution of mechanical engineering.
CA4: Applying knowledge and understanding related to the implementation of engineering projects adapted to their level of knowledge and understanding, working in collaboration with engineers and non-engineers. The projects may concern components, equipment and mechanical systems of various kinds and for the widest possible applications.
CA6: Applying knowledge and understanding related to the identification, location and retrieval of data and information necessary for the assessment.
CA11: Applying improved knowledge and understanding to present in written, verbal and, if necessary, multimedia form, their arguments and the results of their own study or work, with characteristics of organic and technical rigour.
CA15: Applying knowledge and understanding to achieve adequate preparation for tertiary level university studies (frequency to post-master's degree courses and doctoral schools) in order to further deepen knowledge and skills in research.
Lectures with the aid of notes provided by the teacher.
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teacher: MOODLE https://e-l.unifi.it/
Type of Assessment
The assessment of the student requires the completion of three written assignments. The three manuscripts must be presented and are assessed during the oral examination.
The assignments consist of preliminary design of different turbomachinery configurations. The student is asked to orally answer one or more questions to the end of assessing his/her ability to explain the course subjects.
The student must demonstrate his/her ability to discuss the operation, the main issues, and the design criteria of the different kinds of turbomachinery and their components.
- 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
- details of running characteristic.
- pumps topology (impeller, diffuser and volute).
- cavitation and NPSH.
- pump design and sizing.
- basic theory.
- cascade flowfield, profile losses, transonic stages.
- Through flow and 3D effects.
- Axial turbine blades.
- Stage analysis.
- 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
- 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