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

In: High Performance Computing in Science and Engineering '11

Author

Listed:
  • 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)

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.

Suggested Citation

  • J. Starzmann & M. V. Casey & J. F. Mayer, 2012. "Unsteady Numerical Study of Wet Steam Flow in a Low Pressure Steam Turbine," Springer Books, in: Wolfgang E. Nagel & Dietmar B. Kröner & Michael M. Resch (ed.), High Performance Computing in Science and Engineering '11, edition 127, pages 437-450, Springer.
    • Handle: RePEc:spr:sprchp:978-3-642-23869-7_32
    DOI: 10.1007/978-3-642-23869-7_32
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