Most unfavorable condition analysis of subway train blocked in a tunnel

Tunnel ventilation design should be based on the most unfavorable condition of the subway train blocked in a tunnel. Taking a rail transit project as an example, with the CFD simulation, analyses the flow characteristics of three different relative positions of train to jet fan, concludes the influence of subway train block on rising pressure of jet fan and flow resistance loss, and provides the most unfavorable condition of the subway train blocked in a tunnel. Moreover, proposes the conversion coefficient of jet fan under the most unfavorable condition, in the expectation of providing reference for the rail transit project design.