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Numerical prediction on the mitigation of shock wave using geometric barriers


The propagation and mitigation of shock waves inside the shock tube have a great interest to researchers. This study focuses on shock wave mitigation using different geometric barriers inside the shock tube's driven section. The underlying concept of shock mitigation is to produce a multiple reflection and diffraction of a shock wave with very minimum flow obstructions. The planar shock wave generated from the shock tube interacted with different geometric barriers like a zig-zag barrier, inclined barrier, and staggered vertical barrier was studied computationally and discussed. In the zig-zag barrier case, the shock wave was repeatedly reflected and diffracted inside the geometrical passage without any obstructions and mitigated the shock wave. On the other hand, inclined and staggered vertical barrier cases involve the alternate flow obstruction due to the barrier, which retards the mass motion velocity. It results in a significant reduction of shock pressure in the downstream region. The numerical analysis was simulated using the inviscid and Navier–Stokes equations with air as an ideal gas. The numerical model was validated based on the experimental results. The numerical studies show that the geometric barriers have a considerable impact on the mitigation of shock wave inside the shock tube.

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This work was supported by the National Research Foundation of Korean (NRF) grant funded by the Korea government (MSIP) (No. NRF-2021R1I1A3044216).

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Correspondence to Heuy Dong Kim.

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Rajasekar, J., Yaga, M. & Kim, H.D. Numerical prediction on the mitigation of shock wave using geometric barriers. J Vis (2022).

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  • Shock mitigation
  • Shock tube
  • Unsteady flow
  • Reflection
  • Diffraction
  • Compressible flow