High-Fidelity Simulations of Low-Pressure Turbines: Effect of Flow Coefficient and Reduced Frequency on Losses
V Michelassi, L Chen, R Pichler, R Sandberg, R Bhaskaran
JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME | ASME | Published : 2016
Large eddy simulations validated with the aid of direct numerical simulation (DNS) are used to study the concerted action of reduced frequency and flow coefficient on the performance of the T106A low-pressure turbine profile. The simulations are carried out by using a discretization in space and time that allows minimizing the accuracy loss with respect to DNS. The reference Reynolds number is 100,000, while reduced frequency and flow coefficient cover a range wide enough to provide valid qualitative information to designers. The various configurations reveal differences in the loss generation mechanism that blends steady and unsteady boundary layer losses with unsteady wake ingestion losses..View full abstract
Awarded by UK turbulence consortium
Awarded by Oak Ridge National Lab
The authors would like to thank General Electric for permission to publish this work. Computations have been conducted on the UK national facility ARCHER using resources provided by the UK turbulence consortium under Grant No. EP/L000261/1 and on TITAN at Oak Ridge National Lab under Grant No. ARD106. The authors from the University of Southampton gratefully acknowledge the financial support from General Electric.