Journal of the Korean Society of Visualization (한국가시화정보학회지)

The Korean Society of Visualization (한국가시화정보학회)
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Computational Analysis of Mitigation of Shock wave using Water Column

액주를 이용한 충격파 완화에 대한 수치해석

  • Jayabal, Rajasekar (Department of Mechanical Engineering, Andong National University) ;
  • Tae Ho, Kim (Department of Mechanical Engineering, Andong National University) ;
  • Heuy Dong, Kim (Department of Mechanical Engineering, Andong National University)
  • Received : 2022.10.20
  • Accepted : 2022.11.04
  • Published : 2022.11.30
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Abstract

The interaction of planar shock wave with rectangular water column is investigated numerically. The flow phenomenon like reflection, transmission, cavitation, recirculation of shock wave, and large negative pressure due to expansion waves was discussed qualitatively and quantitatively. The numerical simulation was performed in a shock tube with a water column, and planar shock was initiated with a pressure ratio of 10. Three cases of the water column with different thicknesses, namely 0.5D, 1D, and 2D, were installed and studied. Water naturally has a higher acoustic impedance than air and mitigates the shock wave considerably. The numerical simulations were modelled using Eulerian and Volume of fluids multiphase models. The Eulerian model assumes the water as a finite structure and can visualize the shockwave propagation inside the water column. Through the volume of fluids model, the stages of breakup of the water column and mitigation effects of water were addressed. The numerical model was validated against the experimental results. The computational results show that the installation of a water column significantly impacts the mitigation of shock wave.

Keywords

Acknowledgement

This work was supported by a Research Grant from Andong National University.

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