COMPUTATION OF VENTILATION AERODYNAMICS IN SINGAPORE'S NEW UNDERGROUND EXPRESSWAY TUNNEL

摘要

This work is concerned with the development and application of a computational fluid dynamics based model for predicting all possible ventilation aerodynamic flow, pollution and fire scenarios in an underground road tunnel that is being constructed in Singapore. This work addresses flow modeling for the underground road tunnel ventilation studies, pollution and fire modeling studies and presents the computed results and discussion pertaining to the estimation of pollution levels in the underground road tunnel during a simulated traffic jam and the simulation of vehicular fires in the tunnel and the management and control of a simulated fire in the tunnel by operating flow conditioning and ventilation systems. The model can serve as a tool for enabling the engineers to perform scenario planning for effective design and control of the ventilation inside the tunnel.