A complementary experimental and computational study was performed to characterize the test section flowfield of a variable-Mach-number supersonic wind tunnel. A planar laser Rayleigh scattering technique using CO 2 nanocrystals was used to capture cross-sectional flow visualizations at various test section streamwise locations. Reynolds-averaged Navier–Stokes simulations of the wind tunnel flow were performed using a k - ω shear stress transport turbulence model to compare against the flow visualizations. Mach 3.20 and 3.55 flow conditions were investigated in the wind tunnel with an empty test section. The Rayleigh signal profile near the wind tunnel walls was compared against boundary-layer thickness data from shadowgraph visualizations, pitot survey measurements, and numerical simulation predictions to guide the interpretation of the scattering results. A brief discussion regarding the nature and potential source of certain unexpected scattering patterns in the images was provided. The most distinguishable flowfield characteristics observed in the Rayleigh scattering visualizations were the asymmetric thickness of the boundary layers along the test section walls and the appearance of two floor lobes near the flow-path corners. The results of the numerical simulations showed favorable agreement with the experimental data and were used to provide insight into the mechanism that caused the boundary-layer features observed. This study demonstrated the usefulness of CO 2 Rayleigh scattering to obtain flow visualization data of great value to better understand flow quality in supersonic wind tunnels with two-dimensional nozzles.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Supersonic Wind Tunnel Flow Characterization Using Planar Laser CO 2 Rayleigh Scattering


    Beteiligte:

    Erschienen in:

    Journal of Aircraft ; 61 , 2 ; 543-557


    Erscheinungsdatum :

    2023-11-29


    Format / Umfang :

    15 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    CHARACTERIZATION OF SUPERSONIC WIND TUNNEL FLOW QUALITY USING PLANAR LASER CO2 RAYLEIGH SCATTERING

    Munoz, Camilo Aguilera / Sosa, Jonathan / Hyde, Evan W. et al. | TIBKAT | 2021


    Characterization of Supersonic Wind Tunnel Flow Quality Using Planar Laser CO2 Rayleigh Scattering

    Aguilera Munoz, Camilo / Sosa, Jonathan / Hyde, Evan W. et al. | AIAA | 2021


    Condensation effects on Rayleigh scattering measurements in a supersonic wind tunnel

    Shirinzadeh, B. / Hillard, M. E. / Exton, R. J. | NTRS | 1991


    Condensation effects on Rayleigh scattering measurements in a supersonic wind tunnel

    SHIRINZADEH, B. / HILLARD, M. E. / EXTON, R. J. | AIAA | 1991