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

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