This paper aims to study the extended trailing edge airfoil for a range of angle of attack at different intensities of turbulence.

    Design/methodology/approach

    In this paper, an experimental study on NACA 0020 airfoil with thin extended trailing edge modification of amplitude of h = 0.1c, 0.2c and 0.3c at the Reynolds number of 2.14 × 105 are tested. The research was carried out for an angle of attack ranging from 0° = α = 35° for the turbulence intensity of 0.3%, 3%, 5%, 7% and 12%. From the experimental readings, the surface pressures are scanned using a Scanivalve (MPS2464) pressure scanner for a sampling frequency of 700 Hz. The scanned pressures are converted to aerodynamic force coefficient and the results are combined and discussed.

    Findings

    The airfoil with the extended trailing edge will convert the adverse pressure gradient to a plateau pressure zone, indicating the delayed flow separation. The CL value at higher turbulence intensity (TI = 12%) for the extended trailing edge over perform the base airfoil at the post-stall region. The maintenance of flow stability is observed from the spectral graph.

    Practical implications

    A thin elongated trailing edge attached to the conventional airfoil serves as a flow control device by delaying the stall and improving the lift characteristics. Additionally, extending the airfoil's trailing edge helps to manage the performance of the airfoil even at a high level of turbulence.

    Originality/value

    Distinct from existing studies, the presented results reveals how the extended trailing edge attached to the airfoil performs in the turbulence zone ranging from 0.3% to 12% of TI. The displayed pressure distribution explains the need for increasing trailing edge amplitude (h) and its impact on flow behaviour. The observation is that extended trailing edge airfoil bears to maintain the performance even at higher turbulence region.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Effect of turbulence intensity on aerodynamic characteristics of extended trailing edge airfoil


    Contributors:

    Published in:

    Publication date :

    2022-05-09


    Size :

    1 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Effect of Airfoil Aerodynamic Load on Trailing Edge Noise

    Moreau, Stéphane / Roger, Michel / Iaccarino, Gianluca | AIAA | 2003



    Divergent-Trailing-Edge Airfoil

    Henne, Preston A. / Gregg, Robert D. | NTRS | 1988



    Aircraft airfoil trailing edge

    LIANG SHUANG / NIE TUN / ZHANG BIN et al. | European Patent Office | 2020

    Free access