This paper presents a low-order model applying the immersed boundary method on smeared geometry. It is thus able to represent the effect of turbomachinery within a complex system. Assessment of this model on the NASA rotor 67 has been made under clean flow conditions. Good agreement has been achieved between the immersed boundary method on smeared geometry model, experiments, and a high-fidelity computational fluids dynamics model. For high-speed conditions, about within 0.5, 1, and 1% agreements are achieved on the pressure ratio, efficiency, and choking flow, respectively, between immersed the boundary method on smeared geometry model and the experiment. The capability of the model capturing the fan’s behavior under inlet distortion has also been assessed under the flow with a level of 10% distortion of the total pressure, which covers a 120 deg sector. The nonuniform work input of the fan, which is one of the key features of the fan–distortion interaction, has been captured by the immersed boundary method on smeared geometry model. Finally, the model also helps to shed light on the physical understanding of fan–distortion interaction. It provides evidence suggesting that the tangential pressure gradient is one of the mechanisms causing the induced nonuniform work input of the fan subjected to the inlet distortion.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Hierarchical Immersed Boundary Method with Smeared Geometry



    Published in:

    Publication date :

    2017




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English



    Classification :

    BKL:    55.50 Luftfahrzeugtechnik / 55.50
    Local classification TIB:    770/7040



    Hierarchical Immersed Boundary Method with Smeared Geometry

    Cao, Teng / Hield, Paul / Tucker, Paul G. | AIAA | 2016


    Hierarchical Immersed Boundary Method with Smeared Geometry

    Cao, Teng / Hield, Paul / Tucker, Paul G. | AIAA | 2017


    Hierarchical Immersed Boundary Method with Smeared Geometry (AIAA 2016-2130)

    Cao, Teng / Hield, Paul / Tucker, Paul G. | British Library Conference Proceedings | 2016


    How Whitehall smeared its IT critics

    British Library Online Contents | 2009