行车隧道通风机射流作用下污染物浓度分布模拟试验*
Simulation test of pollutant concentration distribution for road tunnel ventilation with jet fans
摘要：
为研究行车隧道内污染物在通风射流风机作用下的分布规律，对行车交通风与射流场共同作用下的污染物分布进行了模拟试验研究。使用隧道试验平台测试数据检验了用于隧道通风的射流风机和隧道边界条件数值模型，在车流与风机射流共同作用下，对不同车型与行车速度下CO与NO2的浓度场进行了计算，分析了射流纵向影响范围、通风效率与污染物通风去除效率3个指标，得出了污染气体浓度分布受通风射流风机与车辆流动影响的规律。
Abstract：
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.
Keywords:roadtunnel,ventilationfan,jetflow,pollutantconcentration,jetlongitudinalinfluencerange,ventilationefficiency,pollutantremovalefficiency