The module aims at supplying the fundamentals of fluid-flow machines, with specific reference to constructive aspects, principles of operation, evaluation of performance and off-design operations of both the single fluid-flow machine and the energy system in which it is inserted. Through the systematic application of the principles of thermo-fluid-dynamics to energy conversion systems and their components, the module provides the students with the ability not only to choose engines and engineering-plant solutions in relation to their applications, but also to approach and solve specific design problems by integrating the concepts acquired in the module with advanced notions on specific topics.

Through the systematic application of the principles of thermo-fluid-dynamics to energy conversion systems and their components, the module provides the students with the ability not only to choose engines and engineering-plant solutions in relation to their applications, but also to approach and solve specific design problems by integrating the concepts acquired in the module with advanced notions on specific topics.

Knowledge of the fundamentals of thermodynamics, heat transfer and chemistry. Knowledge of the principles of applied mechanics and of fluidmechanics.

• Introduction to Fluid Machines. Thermodynamics and Fluid-Dynamics applied to fluid machines. • Blade geometry and nomenclature, turbomachine stages, velocity diagrams, Euler work equation. • 1D theory of compressible flows: Nozzles and diffusers. Design of a nozzle, off-design performance. • 1-D analysis of axial-flow turbine stages. Notice on radial-flow and mixed-flow turbines. • Thermodynamic analysis of a compression process. 1-D analysis of axial-flow and centrifugal turbocompressors. • Fundamentals of combustion thermodynamics. • Gas turbine plants. Notices on combined-cycle plants. • Dynamic similitude. Performance characteristics of compressors and turbines. Control of gas turbines and compressors • Volumetric compressors

The applied lectures consist in solving exercises and practical problems by applying the concepts covered in the lessons. The aim of this training is to give the students the order of magnitude of the main parameters and to improve their degree of understanding.

•M.J. Moran, H.N. Shapiro, "Fundamentals of Engineering Thermodynamics", 5th ed., John Wiley & Sons. •S.L. Dixon, C.A. Hall, "Fluid Mechanics and Thermodynamics of Turbomachinery", 6th ed., Butterworth-Heinemann, Elsevier. •S.A. Korpela, "Principles of Turbomachinery", 1st ed., John Wiley & Sons •Lecture Slides. •Solution of the applied lectures.

Modalità di esame: Prova orale facoltativa; Prova scritta tramite PC con l'utilizzo della piattaforma di ateneo;

The exam is composed by a written part and by an oral one, the latter being at the sole discretion of the Exam Commission (see the ‘Oral exam’ section below). Written test (overall duration: 1h 50 m) The written test is divided into two parts: - The first part is composed by 15 multiple-choice questions. The questions are concerned with the theory topics, but a few of them will require the solution of short numerical problems. Each correct answer will score 2 points, each blank (not given) answer will bring 0 points, and each wrong answer will bring -0,5 points. Each question will have only one correct answer. The maximum score for the first part is 30/30. - The second part will require the solution of two exercises, in the form of essay questions. The maximum score is 30/30. The exam is not passed if the score from the first written part is strictly lower than 15/30 OR the one from the second part is strictly lower than 15/30. The final mark of the written test is given by the average between the two parts. Candidates can use only a pen, paper sheets and a non-programmable scientific calculator, along with a printed version of the official course formulary. DO NOT ADD NOTES ON THE FORMULARY. The candidate can withdraw from the written test by leaving it blank, once the 80% of the overall available time has elapsed. In such a case, the exam failure will not be registered. Once the exam will have been submitted and corrected by the commission, the result will be registered either with a positive mark or with a failure. Oral exam The Exam Commission reserves its right to call a student for an oral test, independently on the outcome from the written exam. In such a case, the final mark will be an average between the three parts. The oral exams is mandatory for written test marks between 15 and 17. The commission will also consider any request coming from the students to sit for the oral, and will evaluate them at its sole discretion.

Modalità di esame: Prova scritta (in aula); Prova orale facoltativa; Prova scritta tramite PC con l'utilizzo della piattaforma di ateneo;

The exam is composed by a written part and by an oral one, the latter being at the sole discretion of the Exam Commission (see the ‘Oral exam’ section below). Written test (overall duration: 1h 50 m) The written test is divided into two parts: - The first part is composed by 15 multiple-choice questions. The questions are concerned with the theory topics, but a few of them will require the solution of short numerical problems. Each correct answer will score 2 points, each blank (not given) answer will bring 0 points, and each wrong answer will bring -0,5 points. Each question will have only one correct answer. The maximum score for the first part is 30/30. - The second part will require the solution of two exercises, in the form of essay questions. The maximum score is 30/30. The exam is not passed if the score from the first written part is strictly lower than 15/30 OR the one from the second part is strictly lower than 15/30. The final mark of the written test is given by the average between the two parts. Candidates can use only a pen, paper sheets and a non-programmable scientific calculator, along with a printed version of the official course formulary. DO NOT ADD NOTES ON THE FORMULARY. The candidate can withdraw from the written test by leaving it blank, once the 80% of the overall available time has elapsed. In such a case, the exam failure will not be registered. Once the exam will have been submitted and corrected by the commission, the result will be registered either with a positive mark or with a failure. Oral exam The Exam Commission reserves its right to call a student for an oral test, independently on the outcome from the written exam. In such a case, the final mark will be an average between the three parts. The oral exams is mandatory for written test marks between 15 and 17. The commission will also consider any request coming from the students to sit for the oral, and will evaluate them at its sole discretion.