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Tunnel Jet Fan


The jet fan is mainly used for longitudinal ventilation of roads and railway tunnels, and can also be used for other similar occasions, such as auxiliary tunnels and sedimentation tanks.

The jet fan is suspended at the top of the tunnel and uses the tunnel itself as the air duct. The jet fan is specially designed to generate the maximum injection power from a given power consumption. Its operational function is based on the principle of impact transmission. A part of the total air flow through the tunnel is inhaled by the fan during operation and then ejected at high speed by the outlet. Since the squirting airflow changes with the driving force of the remaining air, the energy is injected into the latter, thereby pushing the air in the tunnel toward the outlet end and sucking in fresh air from the inlet. The concentration of carbon monoxide and turbid air increase from the point of entry to the maximum value of the outlet, which is the design value. The fan is installed in the cross section of the tunnel, does not occupy the traffic area, does not require special ventilation, is easy to install, and has low soil construction price.

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