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Action of gas-permeable materials of varied porosity on the supersonic separated flow over a forward-facing step

Postnikov, B. ; Lomanovich, K. ; Ponomarenko, R.

Thermophysics and Aeromechanics, 2018, Vol.25(2), pp.191-197 [Periódico revisado por pares]

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  • Título:
    Action of gas-permeable materials of varied porosity on the supersonic separated flow over a forward-facing step
  • Autor: Postnikov, B. ; Lomanovich, K. ; Ponomarenko, R.
  • Assuntos: supersonic flow ; shock waves ; separated flow ; porosity ; surface step
  • É parte de: Thermophysics and Aeromechanics, 2018, Vol.25(2), pp.191-197
  • Descrição: Results of an experimental and numerical study of a supersonic flow over a model forward-facing step with a gas-permeable insert of variable porosity installed upstream of the step are reported. The free-stream Mach number was M = 2.0, 2.5, and 3.0, and the Reynolds number, Re = 5·10 5 . The gas-permeable insert was either a section of a perforated plate or a section of a highly porous permeable cellular material. The flow visualization performed using the shadow method, PIV, and a soot-oil film has shown that the characteristic size of the vortical flow region exhibited a profound decrease on increasing the insert porosity. In numerical calculations performed at high values of that po-rosity, data on the displacement of the recirculation flow region into the porous material were obtained.
  • Idioma: Inglês

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