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隧道通风设计需按照列车阻塞工况的最不利条件进行。以某轨道交通实际工程为例,采用CFD模拟的手段,分析了列车与射流风机3种相对位置关系下的流动特性,总结出列车阻塞对射流风机升压力的影响和列车阻塞造成的流动阻力损失,分析出列车阻塞工况时的最不利情况;同时给出了射流风机在最不利条件下的折算系数,以供其他轨道交通工程设计时参考。
Tunnel ventilation design should be in accordance with the most unfavorable conditions of the train blocking conditions. Taking the actual project of a rail transit as an example, the CFD simulation method is used to analyze the flow characteristics under the three relative positions between the train and the jet fan, and the effect of the train jam on the jet pressure and the loss of the flow resistance caused by the train jam are summarized , Analyzes the most unfavorable condition when the train is in blocking working condition and gives the conversion coefficient of the jet fan under the most unfavorable conditions for the reference of other rail transit engineering design.