With the tremendous role played by steam turbines in power generation cycle, it is essential to understand the flow field of condensing steam flow in a steam turbine to design an energy efficient turbine because condensation at low pressure (LP) turbine introduces extra losses, and erosion in turbine blades. The turbulence has a leading role in condensing phenomena which involve a rapid change of mass, momentum and heat transfer. The paper presents the influence of turbulence modelling on non-equilibrium condensing steam flows in a LP steam turbine stage adopting CFD code. The simulations were conducted using the Eulerian-Eulerian approach, based on Reynolds-averaged Navier-Stokes equations coupled with a two equation turbulence model, which is included with nucleation and droplet growth model for the liquid phase. The SST k-ω model was modified, and the modifications were implemented in the CFD code. First, the performance of the modified model is validated with nozzles and turbine cascade cases. The effect of turbulence modelling on the wet-steam properties and the loss mechanism for the 3D stator-rotor stage is discussed. The presented results show that an accurate computational prediction of condensing steam flow requires the turbulence to be modelled accurately.
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ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition
June 13–17, 2016
Seoul, South Korea
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-4986-6
PROCEEDINGS PAPER
Influence of Turbulence Modelling to Condensing Steam Flow in the 3D Low-Pressure Steam Turbine Stage Available to Purchase
Yogini Patel,
Yogini Patel
Lappeenranta University of Technology, Lappeenranta, Finland
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Giteshkumar Patel,
Giteshkumar Patel
Lappeenranta University of Technology, Lappeenranta, Finland
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Teemu Turunen-Saaresti
Teemu Turunen-Saaresti
Lappeenranta University of Technology, Lappeenranta, Finland
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Yogini Patel
Lappeenranta University of Technology, Lappeenranta, Finland
Giteshkumar Patel
Lappeenranta University of Technology, Lappeenranta, Finland
Teemu Turunen-Saaresti
Lappeenranta University of Technology, Lappeenranta, Finland
Paper No:
GT2016-57590, V008T26A036; 11 pages
Published Online:
September 20, 2016
Citation
Patel, Y, Patel, G, & Turunen-Saaresti, T. "Influence of Turbulence Modelling to Condensing Steam Flow in the 3D Low-Pressure Steam Turbine Stage." Proceedings of the ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. Volume 8: Microturbines, Turbochargers and Small Turbomachines; Steam Turbines. Seoul, South Korea. June 13–17, 2016. V008T26A036. ASME. https://doi.org/10.1115/GT2016-57590
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