MJ2487 Aeromechanics Project Course 12.0 credits

This is a course on the multi-disciplinary subject of turbomachinery aeromechanics. The subject combines the sub-topics of unsteady aerodynamics, structural dynamics and turbomachinery. The course will focus on the two main aeromechanical problems (flutter and forced response) that affect axial turbomachines. The students will learn the standard methods that are used to analyze aeromechanical problems and the assumption behind these standard methods.  The students will also gain experience in reading literature on the field. The course will also give the students experience in performing a state-of-the-art aeromechanical analyses using commercial software that is currently used in industry. The students will also gain experience in presenting the results from aeromechanical analyses

The following topics will be covered in the course:

- Modelling of blade motion through modal analysis

- Application of FEM (Finite Element Method) on blade geometries

- Theory of unsteady aerodynamics for aeromechanics (forcing, damping, linear assumption)

- Coupling of structural-dynamic and fluid-dynamic equations

- Theory of flutter and Travelling Wave Modes (TWM)

- Theory of Forced Response and Campbell diagrams

- Industrial perspective of turbomachinery aeromechanics

- Analysis of the current literature

- Using ANSYS CFX software to solve a flutter problem (this include mesh generation, setup and running of steady-state simulations, setting up unsteady flow simulation with moving mesh, running unsteady flow simulation, post processing results for unsteady flow simulation)

- Flutter analysis and reporting 

The Intended Learning Outcomes (ILOs) for the course are that after completing the course the students will be able to:

- describe the phenomena of flutter and forced response

- plot and interpret a Campbell diagram

- analyze the current literature on turbomachinery aeromechanics

- explain the main assumption behind the standard methods used to analyze turbomachinery aeromechanics

- determine the fundamental structural modes of a turbine blade by using a state-of-the-art commercial software

- perform steady and unsteady flow simulations of a 3D turbine blade using  a state-of-the-art  commercial  CFD software

- perform a flutter analysis of turbomachinery blade row

- present and describe the results of an aeromechanical analysis

SG1220 Fluid Mechanics (or corresponding)

SE1010  Solid Mechanics (or corresponding)

MJ2483 Advanced Mechanical Vibrations (or corresponding)

MJ2429 Turbomachinery (or corresponding)

MJ2480 Introductions to Computational Fluid Dynamics and Mathematics (or corresponding)

The literature for the course will be selected articles and lecture notes which will be made available on Canvas.

If the course is discontinued, students may request to be examined during the following two academic years.

• PROJ - Project, 9.0 credits, grading scale: A, B, C, D, E, FX, F
• TEN1 - Written exam, 3.0 credits, grading scale: A, B, C, D, E, FX, F

Based on recommendation from KTH’s coordinator for disabilities, the examiner will decide how to adapt an examination for students with documented disability.

The examiner may apply another examination format when re-examining individual students.

To receive a final, the student must pass both components TEN1 and PROJ. The final grade is dependent on the performance in both components.

Andrew Martin

• All members of a group are responsible for the group's work.
• In any assessment, every student shall honestly disclose any help received and sources used.
• In an oral assessment, every student shall be able to present and answer questions about the entire assignment and solution.