Study on the Maximal Critical Velocity of Pressurization in Subway Station
The prediction model of maximal critical velocity of pressurization was established theoretically by analyzed the pressure’s distribution in both sides of smoke bay. Using the computational fluid dynamics software FDS5.0 to build a 3D model of an island platform with platform edge door, Large Eddy Simulation model was used to obtain the critical velocity in different HRR, ceiling screen’s height and arrangement. Results show that the critical velocity rises with the increasing of HRR, and gradually reaching to the maximal critical velocity; in the range from 0 to 2m, it can be regarded that the maximal critical velocity is linear to ceiling screen’s height. The arrangement of ceiling screen has some influence on the critical velocity; setting ceiling screen around the staircase is more effective to restrict smoke.
Guangfan Li, Yong Huang and Chaohe Chen
W. Zhong et al., "Study on the Maximal Critical Velocity of Pressurization in Subway Station", Advanced Materials Research, Vols. 250-253, pp. 1781-1785, 2011