Modelling 3D Steam Turbine Flow Using Thermodynamic Properties of Steam Iapws-95

Abstract

An approach to approximate equations of state for water and steam (IAPWS-95) for the calculation of three-dimensional flows of steam in turbomachinery in a range of operation of the present and future steam turbines is described. Test calculations of three-dimensional viscous flow in an LP steam turbine using various equations of state (perfect gas, Van der Waals equation, equation of state for water and steam IAPWS-95) are made. The comparison of numerical results with experimental data is also presented.

Keywords

• three-dimensional viscous flow
• steam turbine
• low-pressure cylinder
• sets of equations of state for water and steam iapws-95
• approximations of equations