An innovative application of existing technology is proposed for attenuating the effects of transient phenomena, such as rotor-stator and rotor-strut interactions, linked to noise and fatigue failure in turbomachinery environments. A computational study was designed to assess the potential of passive porosity technology as a mechanism for alleviating interaction effects by reducing the unsteady lift developed on a stator airfoil subject to wake impingement. The study involved a typical high bypass fan Stator airfoil (solid baseline and several porous configurations), immersed in a free field and exposed to the effects of a transversely moving wake. It was found that, for the airfoil under consideration, the magnitude of the unsteady lift could be reduced more than 18% without incurring significant performance losses.


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    Titel :

    On the Use of Surface Porosity to Reduce Unsteady Lift


    Beteiligte:

    Kongress:

    31st AIAA Fluid Dynamics Conference and Exhibit ; 2001 ; Anaheim, CA, United States


    Erscheinungsdatum :

    2001-01-01


    Medientyp :

    Preprint


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    On the use of surface porosity to reduce unsteady lift

    Tinetti, Ana / Kelly, Jeffrey / Bauer, Steven et al. | AIAA | 2001


    Flutter and unsteady lift theory

    Yates, E. C., Jr. | NTRS | 1971


    Unsteady lift of finite wing

    Jones, R.T. | Engineering Index Backfile | 1939



    Lift enhancement due to unsteady aerodynamics

    GREENHALGH, SAMUEL | AIAA | 1993