Mechanical Engineering

Methodologies and modeling approaches to study the thermo-fluid dynamics behaviour of fluid machines used in energy conversion systems and energy uses. Basic design principles and introduction to performance limitations. Introduction. References to Thermodynamics and technical equipment on internal combustion engines fundamentals. Introduction to turbomachinery. Fundamental principles of operation. The stadium: stator and rotor. The study conducted in the one-dimensional steady-state, the Hugoniot eq.ni; subsonic and supersonic nozzles and their size; off-design behavior. The rotors, the velocity triangles and expressions Eulerian specific power; machines axial and radial machines. Jumps enthalpy stator and rotor, total enthalpy and specific power. The degree of reaction of the stages. General characteristics of the blade system for rotor axial and radial machines, tractors and operators. Dimensional Analysis and Theory of similarity of turbomachinery.Buckingham's theorem and dimensional analysis. The use of dimensional analysis in the fields of fluid mechanics and fluid machines in particular.Turbines compressible fluid.The axial turbines: generic structure of a stadium. Stadiums Action and reaction: functional analysis of the stator and the rotor in the limit and in the real discussion of performance and comparison analysis (enthalpy disposable, performance). The turbine speed steps: functional study, critical analysis and applications, the recovery factor. The problems of sealing and the volumetric efficiency; sealing devices; study of labyrinth seals. The moisture in the steam turbines; metastable phenomena of saturated steam in the turbine and the curve of Wilson. Typical problem of sizing in high and low pressure: the choking flow and their tapered and the twist of the blades; twisting vortex free and motioned to the other factors warpage. Installable power through a steam group; analysis and comparison with the possibilities of a group gas. Adjusting the power of steam turbines: choking and lamination, composite regulation. Brief introduction to radial turbines.The hydraulic turbines.Type, configuration, and application fields: Pelton, Francis, Kaplan. Hydrodynamic analysis, velocity triangles, returns and powers; motioned to the function and design problems and the dimensinamento. Characteristic maps. Nod to the regulation. The recovery kinetic exhaust. The cavitation of the turbines and the number of Thoma. Plant hydraulic motors. Nature and potential of water resources, climatic conditions and rainfall, the runoff coefficient. Curve hydrodynamics and planning of the exploitation of waterways.Introduction to operating machines. Prevalence of the machine, the prevalence of the external circuit and their analysis: interaction machine-circuit and operating conditions. Power and performance: generality. Pumps and radial compressors. The radial impeller and possible configurations. Functional analysis of radial impellers (theoretical with endless blades, theoretical with the actual number of blades, real) and comparison between different types of impellers. Characteristic maps. Pumps in parallel and in series. The verification of the proper installation of a pump: (NPSH) a, (NPSH) kings their practical use. Operative axial turbomachinery. The stages of axial compressors: varieties because of the degree of reaction; general analysis and comparisons between the various types of stage. Techniques for buckling vane axial compressors. Constructional features and nod to the sizing. The two-dimensional approach and its need. The theory of the wing profile isolated: circulation, lift and drag, the characteristic curves.Operating machines volumetric. Reciprocating compressors. The single cylinder; analysis of volumetric efficiency in the limit. Nod to the royal seat. Constructive solutions to various sectors: double-acting machines, machines tricilindriche, solutions to differential piston and step; horizontal and vertical machines and their use. Machines inter-chilled. Adjustment of reciprocating compressors. Nod to the sizing. Reciprocating pumps. Diagrams and performance. Problems of design and operation of the periodicity of the scope and the regularization by means of chest tubes; motioned to sizing. (NPSH) for a reciprocating pumps: the pressure tank.

Fundamentals on Physics and Applied Physics (heat and mass transfer, heat exchangers). MANDATORY Knowledge of basics hydraulics and fluid-dynamics, and electrical engineering. MANDATORY Basics of programming. (Optional)

- Lecture notes providedby the Lecturer and distributed free of charge in electronic form to students; - Reference classic texts for comparative analysis with the handouts and materials for making insights: Carmelo Caputo - Collana di MACCHINE (Editrice Masson): Vol. I – Gli impianti convertitori di energia Vol. II – Turbomacchine Vol. III (Tomo I e II) – Macchine volumetriche

3 lectures per week.

Written and oral examinations.

Lectures, laboratory experiences and seminars.

Methodologies and modeling approaches to study the thermo-fluid dynamics behaviour of fluid machines used in energy conversion systems and energy uses. Basic design principles and introduction to performance limitations. Introduction. References to Thermodynamics and technical equipment on internal combustion engines fundamentals. Introduction to turbomachinery. Fundamental principles of operation. The stadium: stator and rotor. The study conducted in the one-dimensional steady-state, the Hugoniot eq.ni; subsonic and supersonic nozzles and their size; off-design behavior. The rotors, the velocity triangles and expressions Eulerian specific power; machines axial and radial machines. Jumps enthalpy stator and rotor, total enthalpy and specific power. The degree of reaction of the stages. General characteristics of the blade system for rotor axial and radial machines, tractors and operators. Dimensional Analysis and Theory of similarity of turbomachinery.Buckingham's theorem and dimensional analysis. The use of dimensional analysis in the fields of fluid mechanics and fluid machines in particular.Turbines compressible fluid.The axial turbines: generic structure of a stadium. Stadiums Action and reaction: functional analysis of the stator and the rotor in the limit and in the real discussion of performance and comparison analysis (enthalpy disposable, performance). The turbine speed steps: functional study, critical analysis and applications, the recovery factor. The problems of sealing and the volumetric efficiency; sealing devices; study of labyrinth seals. The moisture in the steam turbines; metastable phenomena of saturated steam in the turbine and the curve of Wilson. Typical problem of sizing in high and low pressure: the choking flow and their tapered and the twist of the blades; twisting vortex free and motioned to the other factors warpage. Installable power through a steam group; analysis and comparison with the possibilities of a group gas. Adjusting the power of steam turbines: choking and lamination, composite regulation. Brief introduction to radial turbines.The hydraulic turbines.Type, configuration, and application fields: Pelton, Francis, Kaplan. Hydrodynamic analysis, velocity triangles, returns and powers; motioned to the function and design problems and the dimensinamento. Characteristic maps. Nod to the regulation. The recovery kinetic exhaust. The cavitation of the turbines and the number of Thoma. Plant hydraulic motors. Nature and potential of water resources, climatic conditions and rainfall, the runoff coefficient. Curve hydrodynamics and planning of the exploitation of waterways.Introduction to operating machines. Prevalence of the machine, the prevalence of the external circuit and their analysis: interaction machine-circuit and operating conditions. Power and performance: generality. Pumps and radial compressors. The radial impeller and possible configurations. Functional analysis of radial impellers (theoretical with endless blades, theoretical with the actual number of blades, real) and comparison between different types of impellers. Characteristic maps. Pumps in parallel and in series. The verification of the proper installation of a pump: (NPSH) a, (NPSH) kings their practical use. Operative axial turbomachinery. The stages of axial compressors: varieties because of the degree of reaction; general analysis and comparisons between the various types of stage. Techniques for buckling vane axial compressors. Constructional features and nod to the sizing. The two-dimensional approach and its need. The theory of the wing profile isolated: circulation, lift and drag, the characteristic curves.Operating machines volumetric. Reciprocating compressors. The single cylinder; analysis of volumetric efficiency in the limit. Nod to the royal seat. Constructive solutions to various sectors: double-acting machines, machines tricilindriche, solutions to differential piston and step; horizontal and vertical machines and their use. Machines inter-chilled. Adjustment of reciprocating compressors. Nod to the sizing. Reciprocating pumps. Diagrams and performance. Problems of design and operation of the periodicity of the scope and the regularization by means of chest tubes; motioned to sizing. (NPSH) for a reciprocating pumps: the pressure tank.

Fundamentals on Physics and Applied Physics (heat and mass transfer, heat exchangers). MANDATORY Knowledge of basics hydraulics and fluid-dynamics, and electrical engineering. MANDATORY Basics of programming. (Optional)

- Lecture notes providedby the Lecturer and distributed free of charge in electronic form to students; - Reference classic texts for comparative analysis with the handouts and materials for making insights: Carmelo Caputo - Collana di MACCHINE (Editrice Masson): Vol. I – Gli impianti convertitori di energia Vol. II – Turbomacchine Vol. III (Tomo I e II) – Macchine volumetriche

3 lectures per week.

Written and oral examinations.

Lectures, laboratory experiences and seminars.