Journal article
Large-Eddy Simulation and RANS Analysis of the End-Wall Flow in a Linear Low-Pressure Turbine Cascade, Part I: Flow and Secondary Vorticity Fields Under Varying Inlet Condition
Richard Pichler, Yaomin Zhao, Richard Sandberg, Vittorio Michelassi, Roberto Pacciani, Michele Marconcini, Andrea Arnone
Journal of Turbomachinery | American Society of Mechanical Engineers | Published : 2019
DOI: 10.1115/1.4045080
Abstract
In low-pressure turbines (LPTs), around 60–70% of losses are generated away from end-walls, while the remaining 30–40% is controlled by the interaction of the blade profile with the end-wall boundary layer. Experimental and numerical studies have shown how the strength and penetration of the secondary flow depends on the characteristics of the incoming end-wall boundary layer. Experimental techniques did shed light on the mechanism that controls the growth of the secondary vortices, and scale-resolving computational fluid dynamics (CFD) allowed to dive deep into the details of the vorticity generation. Along these lines, this paper discusses the end-wall flow characteristics of the T106 LPT ..
View full abstractGrants
Awarded by Australian Research Council
Funding Acknowledgements
The authors gratefully acknowledge Baker Hughes, a GE Company, for granting the permission to publish this paper. 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 conducted at the University of Melbourne was conducted under a GE research grant.