AG Turbo Ecoflex-turbo project 1.1.16 Investigation of compressor stages with reduced rotor blade count and variable stator pitch
Projektleiter: Prof. Dr.-Ing. habil. Ronald Mailach
Bearbeiter: Dipl. -Ing. Fabian Fietze
wissenschaftliche
Zusammenarbeit: AG TURBO ECOFLEX-turbo
Finanzierung: BMWi, Rolls-Royce Deutschland Ltd & Co KG
Laufzeit: 12/2017 - 11/2020
This project is part of the joint research program AG Turbo ECOFLEX-turbo. Rear compressor stages with small dimensions lead due to mechanical and thermal constraints to large relative radial clearances above the rotor blades in relation to blade height or chord. Using circumferential grooves above the rotor blades has shown to reduce the negative effects of the clearance size on efficiency and stability limit of the compressor. This shall be used to reduce the blade count of the rotor without effects on efficiency and thus decrease the weight and moment of inertia of the rotor drum. Furthermore, it can be expected that some specific parts, similar to the radial clearances, will not scale in the same way as the flow path and blading, e.g. inspection and revision access through standardized borescopes in stator passages. For stator passages an investigation of local variation of stator pitch with respect to stability and flexibility of the overall compressor will take place.
