Simulation on suppressing fire spread of roadway belt by water mist
In order to explore the suppression effect of water mist on the spread of mine belt fire,a mine belt fire model was constructed using FDS software to study the influential mechanism of wind speed,particle size of water mist,and distance between nozzle and fire source on the effect of water mist on belt fire suppression,and explore the distribution law of road-way temperature field and smoke flow law under different working conditions.The results show that water mist can effectively inhibit the spread of belt fire.Within a certain range,the temperature and smoke concentration of the fire site decrease with the increase of wind speed.The wind speed increases from 1 m/s to 2.5 m/s,and the temperature drop rate increases by 18.42％;The temperature and smoke concentration in the fire site decrease with the decrease of spray particle size and the distance between the nozzle and the fire source;droplet size is increased from 200 μm to 400 μm.The cooling and smoke suppression efficiency decreased by 35.20％and 22.85％,respectively;The nozzle is more than 14.5 m away from the fire source,and the suppression effect of water mist is significantly weakened.By increasing the wind speed,reducing the water mist particle size,and reducing the distance between the nozzle and the fire source,the effect of water mist cooling and smoke suppression can be improved,which provides a theoretical basis for the development of roadway fire water mist emer-gency treatment technology and equipment.
water mistbelt firefire spreadinfluential mechanismtemperature field distributionflue gas flow
国家科技期刊平台
NSTL
万方数据
维普
