Modern computer simulations can predict some aspects of the unsteady aerodynamic phenomena associated with turbomachinery blade rows. This allows analysts to investigate aeroelastic phenomena, such as flutter, and blade-row interactions, such as forced response and unsteady effects on performance. This paper describes tools and design processes used to numerically investigate unsteady aerodynamic phenomena in heavy-duty gas turbines. A linearized Navier- Stokes method from the DLR has been used to predict the aerodynamic damping of both compressor and turbine airfoils under a variety of operating conditions. Some of these predictions were validated with engine experience. Other CFD codes, including TRACE from the DLR and ITSM3D from the University of Stuttgart, have been used to predict blade-row interaction. This includes the prediction of forced response due to rotor-vane interaction and unsteady effects on performance. The effects of airfoil clocking, including the effects of cooling flow injection, have also been investigated. Advanced CFD modeling has been developed in research institutes and applied in aircraft engine design, and now contributes to heavy-duty gas turbine design as well. Computational analysis of aeromechanics - both flutter and forced response - unsteady aerodynamic and thermal blade row interaction, and airfoil clocking aimed at aerodynamic and thermal performance optimization are demonstrated for heavy-duty gas turbines. These analyses contribute to better understanding of past experience and offer new design opportunities.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Application of unsteady aerodynamics and aeroelasticity in heavy-duty gas turbines


    Additional title:

    Anwendung der instationären Aerodynamik und Aeroelastizität in Hochleistungs-Gasturbinen


    Contributors:

    Published in:

    Publication date :

    2005


    Size :

    15 Seiten, 27 Bilder, 4 Tabellen, 41 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Aeroelasticity and Unsteady Aerodynamics

    Oates, Gordon C. | AIAA | 1989


    Nonlinear Aeroelasticity and Unsteady Aerodynamics

    Earl H. Dowell / Deman Tang | AIAA | 2002


    Nonlinear aeroelasticity and unsteady aerodynamics

    Dowell, E. / Tang, D. | AIAA | 2002



    Unsteady aerodynamics and aeroelasticity of turbomachines

    International Symposium on Unsteady Aerodynamics and Aeroelasticity of Turbomachines | TIBKAT | 1995