Frequency-domain unsteady lifting-line theory is better developed than its time-domain counterpart. To take advantage of this, this paper proposes a method to transform time-domain kinematics to the frequency domain, perform a convolution, and then return the results back to the time domain. This paper demonstrates how well-developed frequency-domain methods can be easily applied to time-domain problems, enabling prediction of forces and moments on finite wings undergoing arbitrary kinematics. Results are presented for rectangular wings of various aspect ratios, undergoing pitch and heave kinematics. Computational fluid dynamics is used to test the effectiveness of the method in the Euler and low-Reynolds-number ( R e = 10 , 000 ) regimes. Overall, the proposed method provides fast and reasonably accurate predictions of lift and moment coefficients, particularly in comparison to strip theory, which is commonly used for problems involving arbitrary kinematics.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Applying Frequency-Domain Unsteady Lifting-Line Theory to Time-Domain Problems


    Beteiligte:
    Bird, Hugh J. A. (Autor:in) / Ramesh, Kiran (Autor:in)

    Erschienen in:

    AIAA Journal ; 60 , 4 ; 2287-2296


    Erscheinungsdatum :

    2021-12-08


    Format / Umfang :

    10 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    A Geometrically Non-Linear Time-Domain Unsteady Lifting-Line Theory

    Bird, Hugh J. / Otomo, Shuji / Ramesh, Kiran Kumar et al. | AIAA | 2019



    Unsteady lifting-line theory with applications

    AHMADI, A. / WIDNALL, S. | AIAA | 1982


    Usefulness of Inviscid Linear Unsteady Lifting-Line Theory for Viscous Large-Amplitude Problems

    Bird, Hugh J. A. / Ramesh, Kiran / Ōtomo, Shūji et al. | AIAA | 2021


    Unsteady Cascade Aerodynamics in the Time Domain

    Dana A. Gottfried / Sanford Fleeter | AIAA | 2002