Abstract
Abstract Based on the multi- scale coupling method which field model and network model are combined, the smoke spread in the underground unidirectional tunnel was studied. We compared with the effect of smoke diffusion during different number of jet fans operated. Results show that when three sets of fans are operated, there is a backlayering of smoke which will influence the simulation of the model, thus we cannot get a steady state of smoke backlayering. When four sets of jet fans are operated, the backlayering of smoke is eliminated, the result of simulation shows more reasonable. However, it is difficult to maintain a steady stratification in the downstream of fire. The results of the study can provide a reference for the design and operation of jet fans in the underground unidirectional tunnels.
Published Version
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