Faculty Engineering Master Mechanical Engineering - Energy and Aeronautics Curriculum Aeronautics Year/Semester 1/I-II Course Title Aeronautical Propulsion and Aeroacoustics ID Course Code 65900 Course Credits (CFU) 12 Course Type integrated course Module Title Aeroacoustics ID Module Code 65901 Module Credits (CFU) Module Scientific-Disciplinary Sector Lecturer-in-charge 6 ING-IND/08 CATTANEI Andrea Learning Outcomes: The course provides the basic knowledge on the dynamics of compressible fluids and the applied know-how relevant for aeronautical and propulsion applications. Course Organisation Details - Quasi-one-dimensional flow in variable-area ducts, one dimensional flow with heat addition. - Normal and oblique shock waves, expansion waves. - Unsteady wave motion: linearized flow for acoustic waves, method of characteristics for finite (nonlinear) waves, moving normal shock waves. - Steady supersonic flow: theory and applications of the method of characteristics, elements of conical flow. - Shock waves-boundary layer interaction. - Subsonic, transonic and supersonic flow on airfoils. - Gas dynamics of propulsive systems: nozzles, diffusers, air intakes, turbomachinery components. - Transonic and supersonic cascades for axial compressors and turbines. Assessment hours Lectures 48.0 Practice 0.0 Laboratory 0.0 Integrative activities 0.0 References J. D. Anderson, Jr, Modern Compressible Flow: With Historical Perspective, McGraw-Hill, New York, 1990. A. H. Shapiro, The Dynamics and Thermodynamics of Compressible Fluid Flow, vol. 1 e 2, The Ronald Press Company, New York, 1953. Organization and examinations Theoretical and applied lectures Oral examinations Pre-requisites - Faculty Engineering Master Mechanical Engineering Energy and Aeronautics Curriculum Aeronautics Year/Semester 2/I-II Course Title Aeroacustics and Aeronautical Propulsion ID Course Code 65900 Course Credits (CFU) 12 Course Type integrated course Module Title Aeronautical Propulsion ID Module Code 65902 Module Credits (CFU) Module Scientific-Disciplinary Sector Lecturer-in-charge 6 ING-IND/08 SATTA Francesca Learning Outcomes The main objective of the course is to supply the instruments for the study of aeronautical propulsion: thrust and performance of the different engine types during the different flight phases, engine layouts and main components responsible for the propulsion. Course Organisation Details - Brief introduction to the aeronautical propulsion history; large aircraft propulsion; standard atmosphere; units used in the aeronautical field. - Classification of the aeroengines: architectures of propeller engines, ramjet, turbojet with and without afterburner, turbofan with low and high by-pass-ratios, pulsejet. - Aircraft aerodynamics principles: lift, drag and momentum coefficients; finite wings and induced drag; wing aspect ratio. - Airplane drag polar; aerodynamic forces acting on the airplane; thrust and power required for level, unaccelerated flight; maximum velocity; rate of climb; gliding flight; absolute and service ceiling; time-toclimb. Range and endurance for propeller driven and jet airplanes. Breguet’s range formula. Takeoff and landing performance. Turning flight and the v-n diagram. - Evaluation of the engine requirements, installed and uninstalled thrust. - Generation of thrust for turbojet, turbofan, and turboprop. Actuator disk and blade element theories. Performance parameters of propulsion systems: cycle efficiency, propulsion efficiency, and overall efficiency. - Turbojet engine: cycle analysis, design paramaters. - Turbofan engine: cycle analysis, by-pass ratio selection. - Turboprop engine: cycle analysis, optimum power split between the propeller and the jet. - Main components responsible for the propulsion: Inlets: main requirements, non-dimensional parameters, diffuser geometries, Sovran and Klomp diffuser performance charts. Nozzles: main requirements, performance, nozzle area scheduling. Thrust reverser and thrust vectoring. Attività didattiche Ore previste Lezione 48.0 Esercitazione 0.0 Laboratorio 0.0 Corso integrativo 0.0 Riferimento bibliografici J. D. Anderson, “Introduction to Flight, Sixth Edition”, McGraw-Hill, 2008 S. Farokhi, “Aircraft Propulsion”, John Wiley & Sons, 2008 N. Cumpsty, “Jet Propulsion”, Cambridge University Press, 1997 R. D. Flack, “Fundamentals of Jet Propulsion with Applications”, Cambridge University Press, 2005 Organizzazione del corso e modalità d’esame Theoretical and applied lectures Oral examinations Pre-requisites -