Duration
26h Th, 26h Pr, 30h Proj.
Number of credits
Lecturer
Language(s) of instruction
English language
Organisation and examination
Teaching in the first semester, review in January
Schedule
Units courses prerequisite and corequisite
Prerequisite or corequisite units are presented within each program
Learning unit contents
Course Structure
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Introduction to Turbomachinery Design: History and Evolution of Turbomachinery; Product Lifecycle Management (PLM); Turbomachinery Design Process and Design Requirements; Architecture and Schematics of Turbomachinery; Single-, Two- and Three-Shaft Engine Architectures; Rotor-Stator Structural Arrangement; Thrust Load Distribution; Bearing Types, Bearing Arrangement and Load Paths.
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Mechanical Architecture and Structural Design: Modular Design of Aircraft Engines; Compressor and Turbine Rotor Architectures; Drum, Disc and Drum-Disc Rotors; Rotor Connections and Couplings; Casing and Support Structures; Engine Mounting and Load Transfer.
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Turbomachinery Rotordynamics: Types and Levels of Modelling; Rotor-Bearing Systems; Computation of Forward and Backward Critical Speeds; Campbell Diagrams; Stability Analysis; Harmonic and Transient Responses; Multi-Rotor and Intershaft-Bearing Behaviour; Bearing Design; Rotordynamic Instability Phenomena.
- Materials, Failure Mechanisms and Lifetime Assessment: Material Selection for Aircraft Engines; Titanium Alloys, Nickel-Based Superalloys, Composites and Ceramic-Matrix Composites; High-Cycle and Low-Cycle Fatigue; Thermomechanical Fatigue; Creep; Fretting; Coatings and Thermal-Barrier Coatings; Lifetime Calculations of Turbine Blades and Disks
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Dynamics of Blades and Disks: Structural Modelling of Blades and Bladed Disks; Campbell Diagrams; Engine-Order and Other External Excitation Sources; Resonance and Forced Response; Aeroelastic Phenomena; Rotor-Stator Interaction; Foreign-Object and Bird Impact.
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Mechanical Design and Stress Analysis of Compressor Components: Compressor and Fan Blade Design; Blade-Disk Attachments and Blisks; Effects of Lean, Sweep and Pre-Twist; Bending-Torsion Coupling; Centrifugal and Aerodynamic Loading; Stress and Deformation Assessment.
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Mechanical Design and Stress Analysis of Disks and Rotors: Rotor Design Criteria; Stress Distribution in Rotating Disks; Centrifugal Loading; Rotor Connections; Design Margins; Overspeed and Burst-Speed Assessment.
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Turbine Blade and Disk Design: Turbine Rotor Architecture; Turbine Blade Attachments; Thermal and Mechanical Loading; Cooled and Uncooled Turbine Blades; Blade and Disk Cooling; Radial Clearance Management and Active Clearance Control.
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Off-Design Operation, Failure Scenarios and Engine Testing: Compressor Matching; Rotating Stall and Surge; Rotor-Stator Interaction; Foreign-Object Damage; Bird and Drone Impact; Fan-Blade-Off Events; Erosion; Engine Certification and Experimental Testing.
Learning outcomes of the learning unit
The objective is to present the methods used in the aeronautical industry to analyze the dynamical behaviour of turbomachines and to design mechanical components of turbojet engines such as compressors, turbine blades and disks.
This course contributes to the learning outcomes I.1, I.2, II.1, II.2, II.3, III.1, III.2, IV.1, IV.3, VI.1, VII.4 of the MSc in aerospace engineering.
Prerequisite knowledge and skills
This course requires basic knowledge of engineering design, structural dynamics, and the finite element method.
Planned learning activities and teaching methods
Mandatory projects will be carried out in groups of two or three students. These projects are designed to provide hands-on experience with methods and tools commonly used in the mechanical design and analysis of turbomachinery.
Siemens Simcenter 3D, together with the SOL 414 solver, will be used during the lectures and project work to illustrate the numerical implementation and practical application of the theoretical concepts introduced in the course.
Mode of delivery (face to face, distance learning, hybrid learning)
Face-to-face course
Additional information:
The course is organised face-to-face during the 1st quadrimester.
Course materials and recommended or required readings
Platform(s) used for course materials:
- eCampus
Other site(s) used for course materials
- Siemens Xcelerator Academy (https://training.plm.automation.siemens.com)
Further information:
Recommended literature
Friswell, Michael I. Dynamics of rotating machines. Cambridge University Press, 2010.
Rao, J. S. Turbomachine blade vibration. New Age International, 1991.
Royce-Rolls. The jet engine. John Wiley & Sons, 2015.
Exam(s) in session
Any session
- In-person
written exam ( open-ended questions ) AND oral exam
Written work / report
Further information:
The final grade will be based on the written or oral exam of theory, the homework and their oral presentation. The exam will consist of answering questions on the course materials. Special attention will be devoted to the knowledge and to the understanding of the theoretical concepts. No document is allowed for the examination.
The assessment is based on the weighted geometric average of the projects and the exam. The final note is calculated as follows:
Final note = (Projects)*(0.75) + (Exam)*(0.25)
Work placement(s)
Organisational remarks and main changes to the course
The course's organisation is presented in detail during the first lecture.
Contacts
Loic Salles l.salles@uliege.be