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Interaction of a swept shock wave and a supersonic wake

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Abstract

The interaction of a swept shock wave and a supersonic wake has been studied. The swept shock wave is generated by a swept compression sidewall, and the supersonic wake is generated by a wake generator. The flow field is visualized with the nanoparticle-based planar laser scattering method, and a supplementary numerical simulation is conducted by solving the Reynolds-averaged Navier–Stokes equations. The results show that the pressure rise induced by the swept shock wave can propagate upstream in the wake, which makes the location where vortices are generated move upstream, thickens the laminar section of the wake, and enlarges the generated vortices. The wake is swept away from the swept compression sidewall by the pressure gradient of the swept shock wave. This pressure gradient is not aligned with the density gradient of the supersonic wake, so the baroclinic torque generates streamwise vorticity and changes the distribution of the spanwise vorticity. The wake shock is curved, so the flow downstream of it is non-uniform, leaving the swept shock wave being distorted. A three-dimensional Mach disk structure is generated when the wake shock interacts with the swept shock wave.

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Acknowledgements

This work has been supported by the National Nature 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, People’s Republic of China

    G. He, Y. X. Zhao & J. Zhou

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  1. G. He
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  2. Y. X. Zhao
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  3. J. Zhou
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Correspondence to J. Zhou.

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Communicated by K. Hannemann.

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He, G., Zhao, Y.X. & Zhou, J. Interaction of a swept shock wave and a supersonic wake. Shock Waves 27, 761–770 (2017). https://doi.org/10.1007/s00193-017-0719-7

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  • DOI: https://doi.org/10.1007/s00193-017-0719-7

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