Identification and quantification of losses in a LPT cascade by POD applied to LES data
D Lengani, D Simoni, R Pichler, RD Sandberg, V Michelassi, F Bertini
International Journal of Heat and Fluid Flow | Elsevier | Published : 2018
A POD based procedure has been developed to identify and account for the different contributions to the entropy production rate caused by the unsteady aerodynamics of a low-pressure (LP) turbine blade. LES data of the extensively studied T106A cascade have been used to clearly highlight the capability of POD to identify deterministic incoming wake related modes, stochastic fine-scale structures embedded within the bulk of the wake carried during migration, and coherent structures originating in the boundary layer as a consequence of the wake-boundary layer interaction process. The POD modes computed by a kinematic kernel generate a full and complete basis, where both the velocity and enthalp..View full abstract
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Awarded by EPSRC
The authors would like to thank General Electric Global Research for permission to publish this work. Computations have been conducted on the UK national facility ARCHER using resources provided by the UK Turbulence Consortium funded by the EPSRC under Grant No. EP/L000261/1.