Checking date: 07/10/2019


Course: 2019/2020

Propulsion systems performance and design
(12440)
Study: Master in Aeronautical Engineering (296)
EPI


Coordinating teacher: DISCETTI , STEFANO

Department assigned to the subject: Department of Bioengineering and Aerospace Engineering

Type: Compulsory
ECTS Credits: 6.0 ECTS

Course:
Semester:




Students are expected to have completed
Students are expected to have basic knowledge of aerospace propulsion systems and turbomachinery.
Competences and skills that will be acquired and learning results.
The students are expected to be able to: - Understand the processes of heat and mass transfer applied to the aerospace propulsion systems - Analyze the performances of the aerospace propulsion systems. - Select and design the most appropriate propulsion system for an aerospace vehicle according to the prescribed mission, including the design of the subsystems composing the engine. - Analyze the performances of turbomachines as part of aerospace propulsion systems.
Description of contents: programme
1. Review of requirements of engine components 2. The engine design process a. The request for proposal b. Constraint analysis and mission analysis c. Parametric cycle analysis i. Turbojet ii. Turbojet with afterburner iii. Turbofan with mixed/unmixed stream d. Performance cycle analysis i. Off-design behavior ii. Component matching iii. Installed performances e. Ramjets and scramjets 3. Sensors, instrumentation and control a. Control systems requirements and strategy b. Basic engine control functions 4. Lubrication and cooling a. Oil systems: lube supply, tank, piping , scavenge system. b. Turbine heat transfer, film cooling, internal cooling (jet impingement, rib-turbulated, pin-fin); effects of rotation. 5. Bearing and seals a. Mainshaft bearing types; b. Fatigue life considerations; c. Dynamic seals types (labyrinth seals, carbon seals) 6. Structural analysis a. Fundamentals of rotordynamics b. Balancing procedures and vibrations suppression. c. Elements of turbomachinery flutter. 7. Engine testing and certification
Learning activities and methodology
LEARNING ACTIVITIES Theory and problems sessions Problem session in computer room Laboratory session Study and personal work of the students TEACHING METHODOLOGY Frontal lectures with support of computer and audiovisual media, in which the main concepts of the subject are developed and the bibliography references are provided. Critical reading recommended by the subject teacher: newspaper articles, reports, manuals and/or academic articles, either for further discussion in class, either to expand and consolidate the knowledge of the subject. Resolution of practical cases, problems, etc. proposed by the teacher individually or in groups Preparation of reports individually or in groups
Assessment System
  • % end-of-term-examination 60
  • % of continuous assessment (assigments, laboratory, practicals...) 40
Basic Bibliography
  • Mattingly J.D., Heiser W.H., Pratt D.T.. Aircraft Engine Design. AIAA EDUCATION SERIES J. S. Przemieniecki Series Editor-in-Chief. 2003
Additional Bibliography
  • Boyce M.P.. Gas Turbine Engineering Handbook. Butterworth-Heinemann. 2011
  • Kerrebrock J.L.. Aircraft Engines and Gas Turbines. The MIT Press. 1992
  • Oates G.C.. Aerothermodynamics of Aircraft Engine Components . AIAA. 1985
  • Walsh P.P., Fletcher P.. Gas Turbine Performance. Blackwell Science Inc. 2004
  • . The Jet Engine. Rolls Royce Technical Publications. 1996

The course syllabus and the academic weekly planning may change due academic events or other reasons.