公路隧道中交通活塞风量的算法及敏感性研究

Study on Algorithm and Sensitivity of the Piston Air Flow in Road Tunnels

为了充分利用交通活塞风以便降低隧道通风系统的能耗,需要计算推导活塞风量,并对影响活塞风量大小的参数及规律开展研究。在隧道行车道空间断面积、汽车等效阻抗面积、入口损失系数、断面当量直径等参数恒定的情况下,分析了车流量、隧道长度、工况车速3个因素对交通活塞风量大小的敏感性。结果表明,敏感性程度由高到低依次为工况车速、车流量和与隧道长度,尤其是隧道长度对交通活塞风量的大小几乎没有影响。

In order to use the piston air flow to reduce energy consumption,it＇s necessary to study its algorithm and sensitivity rules.When the tunnel section area,vehicle equivalent impedance area,entrance loss coefficient and equivalent section diameter are determined,the sensitivity of traffic flow,tunnel length and driving speed are analyzed.The result shows that the sensitivity degree from high to low in order is driving speed,vehicle flow and the tunnel length.Especially,tunnel length has little effect on piston air flow.