Unsteady Numerical Study of Wet Steam Flow in a Low Pressure Steam Turbine

J. Starzmann (), M. V. Casey and J. F. Mayer
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J. Starzmann: Universität Stuttgart, ITSM – Institut of Thermal Turbomachinery and Machinery Laboratory
M. V. Casey: Universität Stuttgart, ITSM – Institut of Thermal Turbomachinery and Machinery Laboratory
J. F. Mayer: Universität Stuttgart, ITSM – Institut of Thermal Turbomachinery and Machinery Laboratory

A chapter in High Performance Computing in Science and Engineering '11, 2012, pp 437-450 from Springer

Abstract: Abstract In steam power plants condensation already starts in the flow path of the low pressure part of the steam turbine, which leads to a complex three-dimensional two-phase flow. Wetness losses are caused due to thermodynamic and mechanical relaxation processes during condensation and droplet transport. The present investigation focuses on the unsteady effects due to rotor-stator interaction on the droplet formation process. Results of unsteady three dimensional flow simulations of a two-stage steam turbine are presented, whereby this is the first time that non-equilibrium condensation is considered in such simulations. The numerical approach is based on RANS equations, which are extended by a wet steam specific nucleation and droplet growth model. Despite the use of a high performance cluster the unsteady simulation has a considerably high simulation time of approximately 60 days by use of 48 CPUs.

Keywords: Steam Turbine; Blade Pitch; ASME Turbo Expo; Monitor Point; Unsteady Simulation (search for similar items in EconPapers)
Date: 2012
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Persistent link: https://EconPapers.repec.org/RePEc:spr:sprchp:978-3-642-23869-7_32

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DOI: 10.1007/978-3-642-23869-7_32

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