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Institute of Turbomachinery and Fluid Dynamics
Logo Leibniz Universität Hannover
Institute of Turbomachinery and Fluid Dynamics
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Aircraft Engines

LecturerDr.-Ing. F. Herbst
Tutor

Philipp Sauer, M.Sc.

Pascal Franke

 

Time/PlaceCan be found on StudIP
Goal

The module introduces basic engineering and physical understanding of the requirements, components and preliminary design of simple aircraft jet engines. After successful completion of the course, the students have knowledge of the thermodynamic changes of state taking place in the individual components of aircraft jet engines and are able to apply this knowledge to the calculation of the engine efficiency, the optimisation of the thermodynamic cycle and also stage theory and straight cascades. Furthermore, the students gain insight into phenomena such as rotating stall, surging, and engine aeroacoustics as well as the dynamic behaviour of jet engines and their control systems. Moreover, the students are able to determine and evaluate the losses, dimensionless quantities, and characteristic maps of aircraft jet engines and their individual components.

Content
  • Meaning of the drive for flight task, hover, types of propulsion, jet propulsion, propeller drive
  • Theoretical basics, basic physical laws, thrust, power and efficiency, mission of a commercial aircraft, schematic structure of simple jet engines, cycle
  • Changes in state of inlet, compressor, combustion chamber, turbine and nozzle
  • Efficiency, optimization of the cycle, definition of the design point, design and layout of jet engine components, compression shocks, stage theory and straight blade lattice, losses, similarity measures, compressor and turbine cooperation
  • Maps, rotating separation, pumps, acceleration behavior, engine control, engine start, engine arrangement on the aircraft, engine noise and acoustic damping
  • Jet engine with afterburning, twin-engine, wave engine, ramjet engine, rocket engines
  • Heat transfer and cooling, development trials for turbines, test benches and measurement technology, computer-aided design and optimization, flow control and loss minimization, pollutants, combustion chamber vibrations.
Recommended Previous Knowledge
  • Fluid Mechanics
  • Turbomachinery
  • Thermodynamics
Recommended Literature
  • Bräunling: Flugzeugtriebwerke: Grundlagen, Aero-Thermodynamik, ideale und reale Kreisprozesse, thermische Turbomaschinen, Komponenten, Emissionen und Systeme. 3. Aufl., Berlin [u.a.] : Springer, 2009
Characteristics -
Type of Exam Written exam
RecommendedFrom 8th semester
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