The Study of Fire Spread Trend in Cable Tunnels with Different Wind Speeds

Recently, power grid fire accidents happen frequently, the cable fire is an important part. To address this issue, it is advisable to conduct effective simulation tests to investigate the impact of various factors on cable fires. Therefore, a simulation model for cable tunnel fires was established based on the typical design of cable tunnels and cable layout schemes, in order to investigate the distribution of temperature and generated gases under different wind speed conditions. According to the simulation results, the higher wind speed condition is more likely to accelerate the fire combustion process and to increase the concentration of harmful gas generation than those obtained for lower wind speed condition. However, higher wind speed potentially reduces the temperature of the upper tuyere more effectively, and then decreases the fire disaster area, avoiding further spread of fire. The high wind speed condition has been found to significantly decrease the amount of harmful gas produced at the air inlet and prevent the multi-directional diffusion of noxious gas. These findings provide some reference for the prevention of cable tunnel fires and the post-disaster handling work.