交通风力自然通风作用原理探析

研究目的:在顶部(或侧壁)设有多处通风孔的单向公路交通隧道中,车辆运动产生的交通风力将在开孔处形成相应的压力,探析其压力的形成和作用过程,以获取这种自然通风形式的计算方法。研究方法:将公路隧道内随机运动的车流假定为恒定持续的车流,根据动量、能量和质量守恒的基本定律,建立相关的关系式,探索分析这种隧道自然通风的气流运动规律。研究结果:建立并求解关于隧道各个分段风速的n元二次方程,其它参数则均可求取。研究结论:在有条件设置通风孔的前提下,单向公路交通隧道采用这种自然通风方式是一种有效的通风方案。

Discussion on Natural Ventilation Action Principle of Traffic Wind Force

Research purposes: In an one-way highway traffic tunnel,when the openings at many locations are set up on roof(or side walls) of the tunnel,corresponding pressure at the opening location shall be formed due to traffic wind force produced by vehicle movement.The purposes are to discuss and analyze the pressure come into being and its action process,and the calculation method of this natural ventilation model can be got thereafter.Research methods: The random traveling car flow in the highway tunnel is assumed to be constant and continuous.According to philosophy of momentum,energy and mass conservation,the relevant relationship is established to search after and the author analyzes regularity of airflow motion of natural ventilation in such tunnel.Research results: Establishing and solving the quadric equation with n unknowns of wind speed in each subsection of tunnel and then other parameters can all be worked out.Research conclusions: Under the premise that ventilation opening can be set,in the one-way traffic tunnel,this natural ventilation mode is also an effective ventilation proposal.