CFD Analysis of a Transient Rotor-Stator Axial Steam Turbine Stage

An axial steam turbine stage has both stationary and rotating components, which are coupled together in a CFD model by multiple frames of reference. There three types interface techniques available to exchange the information between different reference namely frozen rotor, stage, transient stator rotor. Both rotor interfaces used steady state analysis. The operation is inherently an unsteady process. aerodynamic interaction part parts important contributor unsteadiness flow present turbine. Neither two implemented analysis capable predicting effects resulting from rotor-stator due their relative position change. third type interface, stator-rotor simulate fluid motion caused movement components Although enormous computer resources needed for this modelling, it simulates real physics best all, while or quasi-steady numerical approaches only approximate flow, because they neglect blade row interactions. paper presents carried out with compares results.