Abstract
In this paper, the fire model of the tunnel is set up, the geometric model of the tunnel is established, a reasonable grid is divided, and the appropriate fire source power is selected firstly. Secondly, the method of air supply and air intake, the form of installation and arrangement, jet angle and jet speed of air curtain are selected reasonably. Finally, through the establishment of a corresponding physical model, CFD simulation software was used to simulate the movement of the smoke and the concentration of CO, visibility, and temperature of the tunnel under the influence of the piston wind over time by changing the installation position of the air curtain in the same fire environment. The result of the simulation shows that when the air curtain is set in the tunnel about 10-20m away from the fire source center, the smoke prevention effect is the best.
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