Thermo-fluiddynamisches Framework für die probabilistische Auslegung von Gasturbinen

Decentralised power generation and heating using small and medium-sized gas turbines is of
particular importance for the green energy transition. Due to the increased demands on the
cost-effectiveness and efficiency, the thermomechanical loads on the components are
approaching their technical limits. In addition, the increased proportion of operating hours
under partial load and the increasing number of transients experienced by the equipment lead
to more complex boundary conditions for the design. In order to enable the safe and efficient
operation of the systems, it is urgently required to evaluate the system behaviour.
Within the scope of the secondary air system, the ingress of hot gas in cavities, the cooling air
supply to the turbine blades and vanes and its effect on component temperatures must be
evaluated. Thus, the aim of the project was to develop a workflow for an automated workflow
and to assess the sensitivity studies based on existing tools and processes. Another focus was
the development of methods to efficiently record the effects of a large number of input
parameters in a limited number of evaluation runs and ensure their usability for further
applications.
Probabilistic methods were used to provide the desired detailed information on the robustness
of the SAS and the understanding of the behaviour of the system was expanded. This enabled
the establishment of probabilistic methods in the development process of a gas turbine as well
as the reduction of conservatism in the design. The results of the sensitivity studies help to
prioritise future technology developments