Application research of piston wind and vertical axis wind turbine in the subway tunnel

When the above-ground space is insufficient to meet the traffic demand of people, the advantages of underground rail transit are particularly prominent. It has the advantages of short distance, unobstructed and so on, so it is imperative to develop underground rail transit. When the subway train is running, it will push the air forward. Due to the restriction of the tunnel’s inner wall on the air, a large number of piston winds are formed. Piston wind is harmful to train running and tunnel fire, but its air volume and wind speed are considerable. The vertical axis wind turbine has the advantages of small size and high power generation efficiency. It can be embedded in the inner wall of the subway tunnel, and it will not increase the resistance of the train. It can supply power for small electrical equipment in the subway tunnel.