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Application of free interaction theory in swept shock wave/turbulent boundary layer interactions

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Abstract

Fin-generated swept shock wave/turbulent boundary layer interactions were experimentally investigated via nanoparticle-based planar laser scattering method, surface oil flow visualizations, surface pressure measurements, and particle image velocimetry. Surface plateau pressure is also theoretically predicted. The plateau pressure of present quasi-conical swept shock interaction is dependent on the local skin friction coefficient and normal Mach number component, and can be predicted per a criterion deduced from free interaction theory. Visualizations and surface pressure measurements confirm that the surface plateau pressure data are equal to the pressure downstream of the separation shock; the upstream influence line is parallel to the impingement line of the separation shock on the flat plate. These observations support the free interaction theory as-applied to quasi-conical swept shock interactions.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant No. 11472304).

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Authors and Affiliations

  1. Science and Technology on Scramjet Laboratory, National University of Defense Technology, Changsha, 410073, Hunan, China

    He Gang, Zhou Jin & Zhao Yu-xin

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  1. He Gang
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  2. Zhou Jin
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  3. Zhao Yu-xin
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Correspondence to Zhou Jin.

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He, G., Zhou, J. & Zhao, Yx. Application of free interaction theory in swept shock wave/turbulent boundary layer interactions. J Vis 21, 203–214 (2018). https://doi.org/10.1007/s12650-017-0454-2

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  • DOI: https://doi.org/10.1007/s12650-017-0454-2

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