The piston effect is a phenomenon used to ventilate underground railway systems and railway tunnels. When a train passes through the tunnel it pushes out the air in front of it toward the closest ventilation shaft in front, and sucks in air to the tunnel from the closest ventilation shaft behind it.

Retrieved from “http://en.wikipedia.org/wiki/Piston_effect”
Categories: Rail transport | Rail infrastructure | Railway tunnels | Tunnels


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