Longitudinal ventilation in highway tunnels.

摘要

Geometric modeling, setup and solution of the two dimensional computational fluid dynamics model for longitudinal ventilation in road tunnels has been illustrated in this report. In this type of ventilation air is blown from one end of the tunnel towards the fire source so that smoke is kept free at this end. The primary objective established for the model is the ability to simulate the interactive effects of smoke and pollutants in case of fire and the ventilation system to determine the unsafe regions of the tunnel, that is, the regions where the effects of smoke and high temperature are confined, and how these regions are affected by the ventilation system configuration, capacity, and operation.; Computational Fluid Dynamics is a tool that helps solve a wide range of problems in Fluid Mechanics and Heat Transfer. The ability to simulate heat transfer and fluid flow problems numerically before a prototype is built cuts the cost and time of development by orders of magnitude. (Abstract shortened by UMI.)