Programma

PART 1: ELEMENTS OF GAS_DYNAMICS
Introductory concepts; isoentropic compressible flows and normal shock waves; design of gas-dynamic systems. Fanno and Rayleigh flows. Oblique shocks and odograph plane. Prandtlt-Meyer expansion. Compressible potential flows, linear theory and supersonic thin qirfoil. Characteristic method (in 2D and steady).
PART 2: AIRCRAFT PROPULSIVE SYSTEMS
Introductory concepts and classification. Performance parameters. Definition of thrust and power. Definition of efficiencies. Turbo-gas cycle (real and ideal). Simple turbojet; turbofan; ramjet; turboprop. Propellers and blade element theory. Nozzles and diffusera (sub- and super-sonic).
PART 3: ELEMENTS OF HYDRODYNAMIC STABILITY
Introduction to stability analysis in fluid mechanics; vortex sheet; temporal and spatial stability; governing equations, Rayleigh and Orr-Sommerfeld equations; stability of shear and wall-bounded flows; Rayleigh's inflection point theorem; numerical methods for solution of stability problems; modal and non-modal stability; state-space representation of dynamical systems.
Several practical exercises are carried out during the course.

Testi Adottati

Notes distributed by the teacher
HILL P., PETERSON C., “MECHANICS AND THERMODYNAMICS OF PROPULSION”, ADDISON WESLEY PUBL., 2ND ED., 1992.
CUMPSTY N., “JET PROPULSION”, CAMBRIDGE UNIV. PRESS, 1997.

Bibliografia Di Riferimento

Notes distributed by the teacher. HILL P., PETERSON C., “MECHANICS AND THERMODYNAMICS OF PROPULSION”, ADDISON WESLEY PUBL., 2ND ED., 1992. CUMPSTY N., “JET PROPULSION”, CAMBRIDGE UNIV. PRESS, 1997.

Modalità Erogazione

The course is carried out through traditional lessons given in the room and completed by suited laboratory sessions. Educational material will be rendered available through the web site (including the Moodle platform). During the course, seminars from aerospace industry experts will be given. Visits to aerospace research centers and companies close to the city area, are also planned. The number and location of the visits will be decided during the course along with possible organization constrain. In case of restrictions related to the persistence of the COVID-19 emergency, the procedures that will be adopted will be in line with the general provisions and will be based on the use of the Moodle platform as well as of other systems suited for the management of lessons and exams in remote mode (e.g. the MS Teams platform).

Modalità Frequenza

The attendance to the class is not mandatory but recommended in order to pass the exam. The attendance is not verified and there are no penalties for those who do not attend the class.

Modalità Valutazione

Oral and written examination. The examination dates will be communicated appropriately and published on the web site. Several possibilities will be given to the students to fix the exam starting from the first available date at the beginning of the exam session. In case of restrictions related to the persistence of the COVID-19 emergency, the procedures that will be adopted will be in line with the general provisions and will be based on the use of the Moodle platform as well as of other systems suited for the management of lessons and exams in remote mode (e.g. the MS Teams platform).