Technical features and advantages

The longitudinal ventilation mode is based on the momentum transfer principle. At a certain section of the tunnel, a relatively small part of the air is sucked in by the jet fan, and then ejected by the jet fan. This part of air stimulates the rest of the air in the tunnel, which makes the air in the rest of the tunnel flow along the exit end of the tunnel.

In a tunnel with only one-way traffic lane, the direction of vehicle flow should be the same as that of jet fan. In the tunnel with two-way traffic lane, it is necessary to install the jet fan with bidirectional jet function (reversible jet fan). In actual use, the injection direction is determined according to the direction of the maximum traffic flow.The longitudinal ventilation mode is based on the momentum transfer principle. At a certain section of the tunnel, a relatively small part of the air is sucked in by the jet fan, and then ejected by the jet fan. This part of air stimulates the rest of the air in the tunnel, which makes the air in the rest of the tunnel flow along the exit end of the tunnel.