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Normal Shock Wave Diffraction Over a Three-Dimensional Corner

  • Randall T. Paton
  • Beric W. Skews
  • Cheryl M. Cattanach
Conference paper

Abstract

The diffraction over a corner normal to the direction of travel of a shock wave has been well documented. This has also been extended to the diffraction of a shock wave over edges with discontinuous profiles in the flow direction. However, these studies have only considered the diffraction of a shock wave travelling over a single, plane surface initially. The current study extends this to consider the dynamics of a plane shock wave travelling simultaneously over two orthogonal surfaces, analogous to a shock wave travelling over the roof and wall of a rectangular building. The flow field bears similarity to the diffraction of a shock wave over a convex diffraction edge whereby there is thickening of the vortex tube formed at the axis defined by the common edge of the two surfaces with outboard thinning. However, as the Mach number of the incident shock wave increases, the vortex tubes shed from the two diffraction edges no longer merge into a single tube but rather each terminates in the downstream face. This also results in curvature of these vortex tubes away from the face rather than remaining approximately parallel to the downstream face as seen in most cases. These results were derived experimentally and computationally for a Mach number in the range M1.3–M1.6.

References

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  • Randall T. Paton
    • 1
  • Beric W. Skews
    • 1
  • Cheryl M. Cattanach
    • 1
  1. 1.Flow Research Unit, School of Mechanical, Industrial, and Aeronautical EngineeringUniversity of the WitwatersrandJohannesburgSouth Africa

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