Simulation test of pollutant concentration distribution for road tunnel ventilation with jet fans

To study the pollutant distribution in road tunnels with the operation of ventilation jet fans, simulates and studies the pollutant distribution under the joint affection of traffic fleet and jet flow. Validates the model of jet fan and tunnel ventilation with the data obtained in tunnel test platform, which provides proper boundary conditions and turbulence model. With the joint affection of traffic fleet and jet flow, calculates the concentration fields of CO and NO2 with different vehicle types and driving speeds at the joint affection of traffic speed and jet flow, and analyses three indexes of jet longitudinal influence range, ventilation efficiency and pollutant removal efficiency. Obtains the influence law of ventilation jet fan and vehicle flow on the pollutant concentration distribution.