Journal article
The influence of differentwake profiles on losses in a low pressure turbine cascade
F Hammer, ND Sandham, RD Sandberg
International Journal of Turbomachinery Propulsion and Power | MDPI | Published : 2018
DOI: 10.3390/ijtpp3020010
Abstract
Large eddy simulations were carried out in order to investigate the influence of unsteady incoming wakes with different profiles on the loss mechanisms of the high lift T106Alinear low-pressure turbine (LPT) cascade. Bars placed upstream of the LPT blade were set into rotation around their axis, thus generating circulation, as well as asymmetrical wake profiles. Three different rotation rates were simulated, yielding different wake parameters that were then compared to an actual turbine blade wake profile. Whereas the commonly-used non-rotating bars generated wakes with turbulent kinetic energy levels several times higher than that of an actual blade wake, the case with counter-clockwise rot..
View full abstractGrants
Awarded by Engineering and Physical Sciences Research Council
Funding Acknowledgements
The simulations have been carried out on the supercomputer of the U.K. National Supercomputing Service ARCHER. Resources were provided by the U.K. Turbulence Consortium funded by the EPSRC under Grant Number EP/L000261/1. Furthermore, the authors gratefully acknowledge the Supercomputing facility of the University of Southampton. Richard D. Sandberg acknowledges the financial support by veski.