| 摘要 |
The present invention relates to an apparatus which reduces a micro pressure wave to prevent pressure from being increased due to air compressed when a train enters a tunnel by way of sucking air at an entrance of the tunnel or air in the hood, and a hood which is installed at an entrance of the tunnel to reduce the micro pressure wave with such apparatus. The apparatus which reduces a micro pressure wave includes an intake pipe (10) which is communicated with the entrance of the tunnel or an interior of the hood (2); and an intake device (11) which is formed with an air flow path, and formed with a nozzle unit (15) at a position coupled with the other end of the intake pipe (10). The intake device (11) is coupled with an air flow pipe, and intakes air through the intake pipe (10). When the train enters a tunnel or an interior of the hood (2), air in the entrance of the tunnel or the interior of the hood (2) is introduced through the intake pipe (10) while the air provided through the air flowing pipe is passing through the nozzle unit (15), an internal air pressure of the entrance of the tunnel or the interior of the hood (2) is reduced so that compression wave generated as a train enters to a tunnel is reduced and micro pressure wave caused by the compression wave is reduced. |
