Stability of converging cylindrical shock waves

An experimental and numerical study was made of converging cylindrical shock waves

M. Watanabe; K. Takayama

2005

Scholarcy highlights

  • An experimental and numerical study was made of converging cylindrical shock waves
  • Experiments were conducted in an annular shock tube of 230 mm o.d. and 210 mm i.d. connected to a cylindrical test section of 210 mm diameter
  • It was found in the experiments that the initial shock wave configuration looked cylindrical, it was gradually deformed with propagation towards the center and showed mode-four instability
  • This is attributable to the existence of initial disturbances which were introduced by the struts which supported the inner tube of the annular shock tube
  • This trend was significant for stronger shock waves indicating that at the last stage of shock wave convergence the initial perturbations of the converging cylindrical shock wave were amplified to form the triple point of Mach reflection
  • The numerical results correctly predicted the experimental trend

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