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PS Ventilation Duct simulation

Sylwia Wojnarska 12th July 2012. PS Ventilation Duct simulation. PS Ventilation. Duct in the ceiling – mesh and boundary conditions. Geometry – half of a crossection of a duct – symmetry 1/16 of the whole tunnel – 39m Hole Ø 0,05m, every 0,5m Mass flux – 30000 m³/h

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PS Ventilation Duct simulation

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  1. Sylwia Wojnarska 12th July2012 PS Ventilation Ductsimulation 12th July 2012

  2. PS Ventilation 12th July2012

  3. Duct in the ceiling – mesh and boundary conditions • Geometry – half of a crossection of a duct – symmetry • 1/16 of the whole tunnel – 39m • Hole Ø 0,05m, every 0,5m • Mass flux – 30000 m³/h • Surface 2,6m x 0,55m • Velocity in the inlet – 2,91 m/s • Viscosity model K-ɛ • 1mln elements 12th July2012

  4. Duct in the ceiling –results • Covergence monitors: • Mass balance – inlet+outlet = 0 • Pressure in the inlet - stable • Almost uniformdistribution • The same mass flux every hole • The same velocity every hole • No pressure drop along the duct • Only pressure drop in the holes Mass distribution 12th July2012

  5. Duct in the ceiling –results 12th July2012

  6. Duct in the ceiling –results 12th July2012

  7. Duct on the bottom – mesh and boundary conditions • Geometry – whole crossection of the duct • 1/16 of the whole tunnel – 39m • Hole Ø 0,05m, every 0,5m • Mass flux – 30000 m³/h • Surface 0,64 m² • Velocity in the inlet – 5,1 m/s • Viscosity model K-ɛ • 4mln elements 12th July2012

  8. Duct on the bottom–results • Almost uniformdistribution • The same mass flux every hole • The same velocity every hole • No pressure drop along the duct • Only pressure drop in the holes • Covergence monitors: • Mass balance – inlet+outlet = 0 • Pressure in the inlet - stable 12th July2012

  9. Duct on the bottom–results 12th July2012

  10. Duct on the bottom–results 12th July2012

  11. Thank you for attention! Any questions? Sylwia Wojnarska 12th July2012

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