Gas path analysis for enhanced aero-engine condition monitoring and maintenance

Modeling and Characteristics of a Novel Multi-fuel Hybrid Engine for Future Aircraft

Civil air transportation has undergone significant expansion over the past decades and is continuing to grow. Nevertheless, the tendency of energy depletion and the severe environmental problems yield challenges in its further development. To mitigate the climate impact of civil aviation, the Advisory Council for Aeronautics Research in Europe ...

Generic Analysis Methods for Gas Turbine Engine Performance: The development of the gas turbine simulation program GSP

Numerical modelling and simulation have played a critical role in the research and development towards today’s powerful and efficient gas turbine engines for both aviation and power generation. The simultaneous progress in modelling methods, numerical methods, software development tools and methods, and computer platform technology has provided...

Smart Operation of Gas Turbine Combined Cycle Plants: Prediction and Improvement of Thermal Efficiency at Part Load

This thesis investigates various operational aspects of Gas Turbine Combined Cycle Power Plants (GTCC). GTCC power plants are expected to play an increasingly important role in the balancing of supply and demand in the electricity grid. Although originally meant for predominantly base load operation with high efficiencies, market circumstances,...

Developing Generic Design Expertise for Gas Turbine Engines: Robust Design of a Micro Centrifugal Compressor

Evolution of a centrifugal compressor: From turbocharger to micro gas turbine applications

Fossil fuels are non-renewable resources which take millions of years to form, and whose reserves are being depleted much faster than new ones are being generated. Furthermore, fossil fuels utilization raises environmental concerns, particularly regarding the global climate change,while the increasing price trend indicates that the fossil-fuels...

Flow Characteristics in Lean Direct Injection Combustors

Advancements in nonclassical gas dynamics

Shock waves can be formed in all states of matter, be it in the single- or multi-phase condition, when the substance is subjected to a rapid change of state, e.g., a sudden pressure variation. In the case of shock waves in vapors and gases, because of the fact that the developed theory is often based on the ideal-gas equation of state, it is...

Generic methods for aero-engine exhaust emission prediction

In the thesis, generic methods have been developed for aero-engine combustor performance, combustion chemistry, as well as airplane aerodynamics, airplane and engine performance. These methods specifically aim to support diverse emission prediction studies coupled with airplane and engine simulation. Models for the engine exhaust composition can...

Low NOx emissions from fuel-bound nitrogen in gas turbine combustors

Biomass-derived LCV (Low Calorific Value) gas represents one of the best alternatives for fossil fuels. It is very attractive, because it is CO2 neutral as biomass consumes an amount of CO2 when growing and releases almost the same amount when combusted. However, the raw gasifier producer gas contains a high content of fuel-bound nitrogen (FBN),...

Development and validation of a computer assisted design methodology for gas-turbine-based aircraft engines