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Coupled CFD and Thermal Analysis of a Steam Turbine
Posted Tue October 28, 2003 @09:11AM
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Application A SoftInWay application story details the steady state coupled fluid and solid thermal analysis of a steam turbine secondary flow path.

Prediction of steam turbine rotor and stator thermal state is a complex problem that usually is divided into a set of interdependent problems related to steam flow, heat transfer and thermo-mechanical modeling. Some of most important modeling issues can be identified as follows:

  • Turbine flow path heat transfer boundary conditions;
  • Heat transfer boundary conditions related to the secondary part;
  • Secondary steam flow including the flow in disk/diaphragm cavities and seals;
  • Windage losses;
  • Turbine rotor and stator thermal steady analysis;
  • Seals radial/axial clearance optimization.
The predicted thermal state shows a significant influence of secondary steam bleed flow on the temperature distribution of the rotor and stator.

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