Experimental Investigation of the Interaction between Purge and Main Annulus Flow upstream of a Guide Vane in a Low Pressure Turbine

Sebastian Schrewe
In modern gas turbines or jet engines, the ingestion of hot gas through the hub-side gap between rotor and stator blades has to be prevented successfully in order to shield the turbine discs from high temperatures. For this purpose, compressor air is fed into the rotor-stator wheelspace. There it purges and hence seals the unavoidable gap between the rotor and the stator row which is referred to as the rim seal. In general, this so-called...
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