Study of the effectiveness of water mist curtain in blocking fire-induced smoke in tunnel by means of CFD simulations

Tunnel fire smoke control is an important issue in the area of tunnel safety. Inspired by compartmentation buildings, it worth investigating whether a can be partitioned water mist system into zone and safety zones. If so, people move from safe through system. Obviously, essential question to examine what extent fire-induced heat blocked Thus, present paper, CFD simulations were conducted investigated effectiveness systems on blocking full-scale tunnel. We mainly focus impact nozzle combination effect. Simulation results show that entrainment caused plays main role smoke, has small Based momentum balance ceiling jet flow, correlation total flow rate release was proposed.