Conference Proceedings
LES and RANS Analysis of the End-Wall Flow in a Linear LPT Cascade With Variable Inlet Conditions: Part II — Loss Generation
Michele Marconcini, Roberto Pacciani, Andrea Arnone, Vittorio Michelassi, Richard Pichler, Yaomin Zhao, Richard Sandberg
PROCEEDINGS OF THE ASME TURBO EXPO: TURBOMACHINERY TECHNICAL CONFERENCE AND EXPOSITION, 2018, VOL 2B | AMER SOC MECHANICAL ENGINEERS | Published : 2018
DOI: 10.1115/GT2018-76450
Abstract
In low-pressure-turbines (LPT) at design point around 60–70% of losses are generated in the blade boundary layers far from end-walls, while the remaining 30%–40% is controlled by the interaction of the blade profile with the end-wall boundary layer. Increasing attention is devoted to these flow regions in industrial design processes. Experimental techniques have shed light on the mechanism that controls the growth of the secondary vortices, and scale-resolving CFD have provided a detailed insight into the vorticity generation. Along these lines, this paper discusses the end-wall flow characteristics of the T106 profile with parallel end-walls at realistic LPT conditions, as described in the ..
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Awarded by Australian Research Council
Funding Acknowledgements
The authors gratefully acknowledge Baker Hughes, a GE Company for granting the permission to publish this paper. The compute time for the LES has been provided by the Pawsey Supercomputing center in Perth, Australia, and the Swiss national supercomputing center CSCS in Lugano, Switzerland. The work in the University of Melbourne was conducted under a GE research grant.