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

Munoz, Camilo Aguilera; Sosa, Jonathan; Hyde, E. W.; Goodwin, Gabriel B.; Kessler, David A.; Hess, Andrew M.; Miklosovic, David

doi:10.2514/6.2021-3523

AIAA Propulsion and Energy 2021 Forum 2021

DOI: 10.2514/6.2021-3523

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

Camilo Aguilera Munoz

Jonathan Sosa

E. W. Hyde

et al.

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2024

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Supersonic Wind Tunnel Flow Characterization Using Planar Laser CO2 Rayleigh Scattering

Aguilera,

Sosa,

Hyde

et al. 2024

Journal of Aircraft

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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 [Formula: see text] 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 [Formula: see text] 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 [Formula: see text] Rayleigh scattering to obtain flow visualization data of great value to better understand flow quality in supersonic wind tunnels with two-dimensional nozzles.

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Supersonic Wind Tunnel Flow Characterization Using Planar Laser CO2 Rayleigh Scattering

Aguilera,

Sosa,

Hyde

et al. 2024

Journal of Aircraft

View full text Add to dashboard Cite

show abstract

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

Cited by 1 publication

References 16 publications

Supersonic Wind Tunnel Flow Characterization Using Planar Laser CO2 Rayleigh Scattering

Supersonic Wind Tunnel Flow Characterization Using Planar Laser CO2 Rayleigh Scattering

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