Situation with FIRE CURTAINS

The following examples were visualized using a computer simulation (CFD). In fact, however, the function was also demonstrated in a practical test in the currently probably safest tunnel in Roppen (Austria).
 

The activated FIRECURTAINS 1 increase flow resistance at the exit portal, thereby strongly reducing wind pressure 2 .

Thus, the fire aspiration system can now mostly remove air from the entry portal 3 , and thus the rising smoke is specifically removed 4 . The stalled vehicles remain now (in contrast to the situation without FIRECURTAINS) free of smoke and safe 5 !

Life-saving for the persons!