Flight Propulsion 1 and Gas Turbines

Winter Semester

Lecturer: Prof. Dr.-Ing. Volker Gümmer

Target Student Group: Students of the aerospace master program and people from other engineering master programs

Important information: Beginning from the winter semester 2019/20 the lecture will be taught in English

General information:

  • Master module with 5 ECTS
  • Lecture (2 semester hours) during winter semester
  • Exercise class (2 semester hours) during winter semester

Content:

  • Introduction
    • Classification and scope of thermal engines
    • Principle of continuous and intermittent
    • generation of work; architecture of a gas turbine
    • insight into market situation
    • history of flight propulsion
  • Thermodynamic cycle o Gas properties
    • Thermal and energetic states
    • o Laws of thermodynamics
    • Enthalpy and entropy balance
    • Isentropic and polytropic change of state
    • h-s-Diagram, Divergence of lines of constant pressure, total and static states
    • Joule-Brayton process: Calculation, optimisation with regard to thermal efficiency and work output, process parameters, limitations
  • Flight gas turbine process control
    • Constraints of aero engines
    • Station Identification
    • Thermodynamic cycles of different aero engine configurations
    • Thrust equation
    • Power output and efficiency
    • Engine design and optimisation
  •  Stationary gas turbine process control
    • constraints of application and types of stationary gas turbines
    • Station Identification
    • Thermodynamic cycles of stationary gas turbines
    • Impact of recuperator, inter-cooling and sequential combustion
  • Compressor
    • Basics of gas dynamics
    • Requirements and functions
    • Thermodynamic process of compression
    • aerodynamic conditions in meridional plane/surface – comprehension of absolute and relative frame
    • Velocity triangles; Euler equation of turbomachinery, ideal stage characteristics
    • aerodynamic instabilities (rotating stall, surge)
    • Measures for stability enhancement
  • Turbine
    • Requirements and functions
    • Importance of turbine entry temperature (TET) necessity of blade cooling
    • Types and engineering design of cooling
    • Mechanical and thermal capacity in dependence on used material
    • thermodynamic and aerodynamic conditions
  • Combustor
    • Requirements and significance for the thermodynamic cycle
    • Thermodynamic basics of combustion
    • Design of combustion chambers and their pros and cons
    • Concepts of low emission combustion
    • Cooling of combustion chamber
    • Importance of the temperature profile at the combustor exit
  • Thrust and power output
    • Turbojet, Turboshaft, Turbofan, Thrust variation, Thrust map

Kontakt: VL-FA1@ltf.lrg.tum.de

Current information: tumonline