HIGHLY RESOLVED LES STUDY OF GAP SIZE EFFECT ON LOW-PRESSURE TURBINE STAGE
R Pichler, V Michelassi, R Sandberg, J Ong
PROCEEDINGS OF THE ASME TURBO EXPO: TURBINE TECHNICAL CONFERENCE AND EXPOSITION, 2017, VOL 2A | AMER SOC MECHANICAL ENGINEERS | Published : 2017
Blade-to-blade interactions in a low-pressure turbine were investigated using highly resolved compressible large eddy simulations. For a realistic setup, a stator and rotor configuration with profiles typical of low-pressure turbines was used. Simulations were conducted with an in-house solver varying the gap size between stator and rotor from 21.5% to 43% rotor chord. To investigate the effect of the gap size on the prevailing loss mechanisms, a loss breakdown was conducted. It was found that in the large gap size case, the turbulence kinetic energy levels of the stator wake close to the rotor leading edge were only one third of those in the small gap case, due to the longer distance of con..View full abstract
Awarded by EPSRC
Computer time was provided by the UK Turbulence Consortium under EPSRC grant EP/L000261/1. Additional resources were provided by the University of Southampton through the IRIDIS supercomputer. The Academic authors would like to acknowledge the financial support from General Electric.