The wake formed behind an axisymmetric body aligned with a Mach 2.49 freestream is studied experimentally using non-time-correlated stereoscopic particle image velocimetry (S-PIV), which simultaneously measures all three components of velocity in a two-dimensional plane. To obtain high-resolution data of the entire near-wake flow field, two overlapping measurement fields of view were simultaneously obtained and merged together. The quality of these data is validated using an extensive global experimental uncertainty analysis, and comparisons are drawn and discussed with previous reference laser Doppler velocimetry data of the same flow field. Turbulence statistics were derived from the S-PIV measurements, including all six independent components of the kinematic Reynolds stress tensor, as well as their isotropic and anisotropic tendencies, and fluctuating velocity triple products. These statistics revealed clear spatial trends of dominant turbulence mechanisms, including a well-defined region of fluid entrainment from the recirculation region into the shear layer near the rear stagnation point. A modified turbulent quadrant analysis method was also used, which revealed a clear organization and consistency to the turbulence structure throughout a large portion of the measured flow field.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Three-Component Turbulence Measurements and Analysis of a Supersonic, Axisymmetric Base Flow


    Contributors:

    Published in:

    AIAA Journal ; 57 , 6 ; 2496-2512


    Publication date :

    2019-06-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Stereoscopic PIV Measurements of a Supersonic Axisymmetric Base Flow

    Favale, James V. / Hortensius, Ruben / Elliott, Gregory S. et al. | AIAA | 2017


    Data-Augmented Turbulence Modeling for Supersonic Base Flow of an Axisymmetric Body

    Heo, Seoyeon / Yun, Yeji / Jeong, Minjae et al. | AIAA | 2024


    Turbulence Measurements Using FARRS in a Supersonic Axisymmetric Jet

    Huffman, Richard / Elliott, Gregory / Boguzsko, Martin | AIAA | 2007



    Stereoscopic PIV Measurements of a Supersonic Axisymmetric Base Flow (AIAA 2017-0522)

    Favale, James V. / Hortensius, Ruben / Elliott, Gregory S. et al. | British Library Conference Proceedings | 2017