13920 - Unsteady Aero-Thermodynamics of Turbomachinery Modulübersicht

Module Number: 13920
Module Title:Unsteady Aero-Thermodynamics of Turbomachinery
  Instationäre Aero-Thermodynamik von Turbomaschinen
Department: Faculty 3 - Mechanical Engineering, Electrical and Energy Systems
Responsible Staff Member:
  • Prof. Dr.-Ing. Höschler, Klaus
Language of Teaching / Examination:English
Duration:1 semester
Frequency of Offer: Every summer semester
Credits: 6
Learning Outcome:Upon successful completion of the module, students will attain fundamental knowledge in unsteady phenomena within turbomachines and the aerothermodynamic instabilities affecting both compressors and turbines. Furthermore, students will gain insight into recent cycle innovations and their impacts on turbomachines, as well as the interplay between unsteadiness in turbomachines and combustors. In addition to theoretical understanding, students will acquire practical skills in modeling unsteadiness in turbomachines, utilizing various methods, including high-fidelity and low-order approaches.
Contents:Despite the inherent unsteadiness in turbomachines, the design of turbomachinery has historically neglected the dynamic nature of the flow. The prevalent assumption of steady flow in each blade row overlooks significant phenomena. This oversight becomes particularly critical when dealing with innovative cycles, such as Pressure Gain Combustion cycles, where the unsteadiness reaches extremely high levels, making a steady flow assumption untenable.
The primary objective of this module is to look into the unsteady aerothermodynamics of turbomachines and the associated phenomena affecting the performance of the machines. Following an initial overview of unsteadiness in turbomachines, the module offers a comprehensive examination of introducing unsteady phenomena, exploring their causes, and understanding their effects on both compressors and turbines. Additionally, participants will be introduced to modeling techniques, which will be applied through a class project as part of the learning experience.
The following topics are addressed in this module:
  • Introduction to unsteadiness in turbomachines
  • Aerothermodynamic unsteadiness in axial and radial compressors
  • Aerothermodynamic unsteadiness in turbines
  • Cycle innovations and the effects on turbomachines
  • The intereffects of unsteadiness in turbomachines and combustors
  • Modeling of unsteadiness in turbomachines
  • Design considerations of turbomachines for unsteady operations
Recommended Prerequisites:None
Mandatory Prerequisites:None
Forms of Teaching and Proportion:
  • Lecture / 2 Hours per Week per Semester
  • Seminar / 2 Hours per Week per Semester
  • Self organised studies / 120 Hours
Teaching Materials and Literature:
  • Turbomachinery Flow Physics and Dynamic Performance, Schobeiri, Meinhard T., Springer.
  • Axial Turbine Aerodynamics for Aero-engines, Z. Zou , S. Wang , H. Liu , W. Zhang, Springer.
  • Compressor Aerodynamics, N. A. Cumpsty, Krieger Pub.
  • Scientific journal papers and theses
Module Examination:Final Module Examination (MAP)
Assessment Mode for Module Examination:
  • written exam, 90. min
Evaluation of Module Examination:Performance Verification – graded
Limited Number of Participants:50
Part of the Study Programme:
  • Master (research-oriented) / Hybrid Electric Propulsion Technology / PO 2024
Remarks:None
Module Components:VL + SEM +PRÜ Unsteady Aero-Thermodynamics of Turbomachinery
Components to be offered in the Current Semester: