Comparison of theoretical method of the gas flow in corridors with experimental measurement in real scale

摘要

The paper describes the principles of ventilation of underground structures, tunnels and corridors. It also presents a theoreticalmethod of assessment of corridor structures where primary monitored values are velocity of spreading, temperature and depth of forehead ofsmoke wave in dependance on time and distance from the centre of fire. Results predicated by a theoretical method are compared tothe values measured in a real large-scale experiment conducted in the tunnel Valík on the D5 motorway in the Czech Republic. This paperevaluates a possible use of theoretical calculation for constructions of tunnels. The presented method is based on a buoyancy of flue gases.At common constructions is the buoyancy effect one of the most significant phenomena, which affects the smoke movement. The specific typeof tunnel constructions is the cause of phenomena that fundamentally affect the smoke flow. The importance of a buoyancy effect decreasessignificantly while the openness for tunnel construstions and the effect of fire ventilation becomes the major influences. These describedeffects are the cause of significant variances in realized experiments and applied theoretical method. Based on mentioned importantdiscrepancies it is impossible to recommend this presented calculation method for using of tunnel constructions. The method would requirean important modification so that would take into account the specifics of tunnel constructions.