This paper aims for the analysis of experimental and numerical results of windmilling flow topologies far from freewheeling condition. Two major cooling fans were investigated: a baseline design and an innovative one meant to reach good performance in both compressor and turbine modes. Experiments are conducted with global and local characterizations to determine energy recovery potential and local loss mechanisms. Also, tests were performed on a turbofan engine to confirm some trends observed on the cooling fans. The numerical study is carried out with mixing plane steady simulations, the results of which are in fair agreement with experimental data. The difference of local topology between freewheeling and highly loaded windmill demonstrates that classical deviation rules such as Carter's are not well-suited to highly loaded windmilling flows. Finally, under certain conditions, the minor influence of the stator on the rotor topology indicates that nonrotating elements can be considered as loss generators.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Experimental and Numerical Flow Analysis of Low-Speed Fans at Highly Loaded Windmilling Conditions



    Published in:

    Publication date :

    2017




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English



    Classification :

    BKL:    52.30 Strömungskraftmaschinen, Turbomaschinen / 52.30




    Loss and Deviation in Windmilling Fans

    Gunn, Ewan J | Online Contents | 2016



    Installed nacelle aerodynamics at cruise and windmilling conditions

    Sánchez-Moreno, Francisco / MacManus, David / Tejero, Fernando et al. | Emerald Group Publishing | 2024

    Free access