Research on fire characteristics of different curvature curved tunnels based on PyroSim
In order to explore the fire characteristics of curved tun-nels and study the influence of curvature on the smoke spread of curved tunnel fires,the fire dynamics simulation software Py-roSim was used to study the critical wind speed,temperature dis-tribution,smoke spread law,and roof temperature attenuation law of curved tunnels with different curvatures.The results show that under the same fire source power and fire source location,the critical wind speed is positively correlated with tunnel curvature;Due to the special resistance along the wall,the propagation speed of high-temperature smoke inside the curved tunnel is faster,and as the duration of the fire increases,the difference in smoke propagation speed between the two sides of the tunnel in-creases;The temperature attenuation of the roof in a fire is posi-tively correlated with curvature,and a prediction model for roof temperature attenuation with curvature of 0.6%,0.5%,0.3%,0.25%,and 0.14%is provided.
curved tunneltunnel firePyroSimcurvaturecriti-cal wind speedroof temperature
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