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| Discussion on Natural Ventilation Action Principle of Traffic Wind Force |
| ZHONG Ring-can, GAO Hui-xiang, GONG Bo |
| The Second Survey and Design Institute of China Railway, Chengdu, Sichuan 610031, China |
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Abstract Research purposes: In a 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.
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Received: 13 June 2006
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2006, Vol. 23 
