The flexibilization of turbomachinery is becoming increasingly important due to the steady increase in the share of renewable energies in the electricity market. Due to their compact and modular design, industrial steam turbines (IDT) have the potential to be operated very flexibly. Extraction modules enable controlled steam extraction, for example to feed a district heating network, while at the same time reducing the turbine output generated. Depending on the set operating point, however, these extraction modules can have a sensitive influence on the surrounding flow field and cause time-dependent and highly asymmetrical component loads.
In this project, these operating point-dependent flow fields within a generic extraction module are to be measured and analyzed experimentally. The experimental work is linked to comprehensive numerical investigations carried out by the applicant as part of his dissertation and related publications. With the help of the experimental measurement results on the generic model, the numerical findings are to be verified and examined with regard to general validity. The overriding goal is to increase steam turbine flexibility without sacrificing efficiency, especially at partial load operating points.