Abstract The article discusses the phenomenon of stator Wake/Rotor cascade (W/R) interaction in a steam turbine stage, and the ability to capture it in turbine stage design calculations making use of standard numerical codes. Firstly, the W/R interaction is analysed by comparing its real, experimentally recorded course with the numerical results obtained using vortex theory models and methods. This part of the analysis ends with formulating a conclusion about stochastic nature of the W/R interaction and indicating its reason, which is the vortex structure of the stator wake. Next, a question is discussed whether and how this stochastic nature of the examined phenomenon can be taken into account in calculations of Reynolds Averaged Navier-Stokes (RANS) equations. Differences are indicated between the uniform pattern of the stator wake obtained using a RANS code and the vortex structure of the real wake. It is concluded, however, that despite these differences the RANS results correctly reflect the time-averaged course of the real W/R interaction, and the process of averaging the flow parameters on the sliding plane between stator and rotor calculation areas can be treated as sort of “numerical averaging” of different realisations of the W/R interaction.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Wake-blade interaction in steam turbine stages


    Contributors:

    Published in:

    Publication date :

    2013




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    Unknown


    Classification :

    BKL:    55.40 Schiffstechnik, Schiffbau / 50.92 Meerestechnik



    Vortex-Wake-Blade Interaction in a Shrouded Axial Turbine

    Schlienger, J. | Online Contents | 2005


    Unsteady Turbine Blade Wake Characteristics

    Sieverding, Claus H. | Online Contents | 2004


    Blade Row Interaction in a High-Pressure Steam Turbine

    Chaluvadi, V.S.P. | Online Contents | 2003


    Excitation Characteristics of Steam Turbine Blade

    Zhu, B. / Wu, H. | British Library Online Contents | 1999


    Dynamic Stress Calculation of Steam Turbine Blade

    Baotian, Z. / Houyu, W. | British Library Online Contents | 2000