Abstract
In this study, the long-distance subway tunnel in Qingdao of China adopted semi-transverse extraction ventilation is taken as the research object. STAR-CCM+ software is used to simulate the smoke movement status and study the influence of different exhaust volumetric flow and heat release rates on the smoke layering length in tunnel with the semi-transverse extraction ventilation. Results show that the layering length has a linear decreasing relation with the natural logarithm of the exhaust volumetric flow under different heat release rates. There is opposite relation between the layering length and the natural logarithm of the heat release rate. Based on dimensional analysis and numerical simulations, the prediction model of the layering length and the critical exhaust volumetric flow in tunnel with semi-transverse extraction ventilation is proposed.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call