Simulation of thermal conditions in a steam turbine

• Main Authors: Alexander, Chistyakov, Protsenko, Elena
• Format: Conference Proceeding
• Language: English
• Subjects: Aerodynamics; Computational fluid dynamics; Computer simulation; Continuity equation; Convection-diffusion equation; Coordinates; Cylindrical coordinates; Diffusion rate; Equations of state; Impellers; Mathematical models; Nozzles; Rotation; Steam turbines; Thermal simulation; Turbine blades; Turbines
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/1.5138447

Cylindrical coordinate system is used to model thermal conditions in a steam turbine. The basic equations of aerodynamics in a cylindrical coordinate system in the case of axial symmetry of the medium are: the Navier-Stokes system of equations, the continuity equation, the equation of state. Thermal processes in a turbine are described by the diffusion-convection equation. The model input parameters include: turbine rotation frequency, speed output range on the turbine blades, number of working blades, number of nozzle channels, width of the nozzle channel on the impeller, steam pressure on the impellers. Based on the developed software, the fields of the main physical quantities inside are calculated: the longitudinal and radial components of the velocity vector, rotation speed, pressure, turbulent viscosity, temperature, density. The developed model takes into account the complex geometry of the steam turbine, does not require significant processing when changing the design features of the unit and can be used to calculate the thermal processes of other turbines of a similar design.